### PUG Seminar

##### Whitmore 321 (IGC Lounge)

##### 2024-09-13

NEST (Noble Element Simulation Technique) is a semi-empirical model that describes the charge and light signals generated by particle interactions in liquid noble elements. This tool is particularly effective for simulating the behavior of dark matter detectors that utilize liquid noble elements as target material. In this seminar, I will explain how NEST can be employed to simulate the detector response of liquid-xenon-based detectors used for direct dark matter search.

14:00 | Yen-Ting Chin | Simulations for dark matter experiments with NEST |

### GAPP Seminar

##### Davey 339

##### 2024-09-10

GAPP Seminar Tuesday, Sept. 10th at 2pm in Davey 339 Speaker: George Zahariade, Jagiellonian University (Poland) Title: Semiclassical Backreaction in Quantum Mechanics Abstract: The backreaction of quantum degrees of freedom on classical backgrounds is a poorly understood topic in theoretical physics. Most often it is treated within the semiclassical approximation with the help of various ad hoc prescriptions accounting for the effect of quantum excitations on the dynamics of the background. In this talk I will focus on two popular ones: (i) the mean-field approximation whereby quantum degrees of freedom couple to the classical background via their quantum expectation values; (ii) the stochastic method whereby the fully coupled system is evolved using classical equations of motion for various randomly sampled initial conditions of the quantum degree of freedom, and a statistical average is done a posteriori. I will evaluate the performance of each method in a simple toy model against a fully quantum mechanical treatment, identify its regime of validity, and interpret the results in terms of quantum entanglement and loss of classicality of the background.

14:00 | George Zahariade | Semiclassical Backreaction in Quantum Mechanics |

### Primordial power spectrum in effective theories of inflation, Mauricio Gamonal, Penn State

##### https://relativity.phys.lsu.edu/ilqgs/gamonal091024.pdf

##### 2024-09-10

International Loop Quantum Gravity Seminar

10:00 | Mauricio Gamonal | Primordial power spectrum in effective theories of inflation |

### Special Seminar

##### 323 Whitmore Lab

##### 2024-07-25

Leonardo Chiesa (U Trento) will give a special seminar talk entitled: Detailed neutrino-matter interaction rates in binary neutron star mergers GW170817 marked the first outstanding detection of a gravitational-wave signal from the coalescence of a binary neutron star (BNS) system. The successful follow-up campaign for electromagnetic counterparts has confirmed the remarkable scientific potential of BNS mergers as multi-messenger astrophysical sources. To fully harness this potential, reliable theoretical modeling is essential to avoid systematic errors when interpreting observations. For instance, the interplay between neutrinos and nuclear matter can generate distinct fingerprints on the coalescence, such as affecting the fate of the post-merger remnant or the final nucleosynthesis outcome in the ejecta. To properly model the impact of neutrinos in numerical BNS simulations, one should provide neutrino-matter interaction rates that are as accurate as possible. However, current implementations often rely on oversimplifications or omit potentially relevant neutrino-matter reactions. To address this need, I will present a novel numerical library designed to evaluate detailed neutrino-matter interaction rates in the context of BNS mergers. The library incorporates the impact of various physical effects on the rates, which are typically not considered in standard implementations. As an application example, I will exploit the library to predict typical neutrino rates for thermodynamics conditions taken from the post-merger phase of BNS merger simulations with moment-truncated (M1) neutrino transport. Such a study can help to identify the minimum set of relevant reactions and the corresponding accuracy needed to precisely predict the impact of neutrinos on the system.

11:30 | Leonardo Chiesa | Detailed neutrino-matter interaction rates in binary neutron star mergers |

### Special Seminar

##### 323 Whitmore Lab

##### 2024-07-23

Authur Offermans (KU Leuven) will give a special seminar talk entitled: A general-relativistic full Boltzmann solver based on the finite volume method Simulations of astrophysical systems where neutrinos play a significant role, like core-collapse supernovae, would ideally solve the neutrino transport equation fully, i.e. solve the full Boltzmann equation. Because of its very high computational cost (6+1D), simulations generally rely on approximations of the equation that are more affordable. It is however difficult to estimate what is lost through these approximations and their impact on the system if we do not have access to a full solution. Therefore, we developed a multidimensional full Boltzmann solver based on the Finite Volume method within the GRMHD simulation code Gmunu. We will present our solver, discuss some of the challenges related to a full Boltzmann solver and show the performance of our solver on some first test cases.

11:00 | Arthur Offermans | A general-relativistic full Boltzmann solver based on the finite volume method |

### Remembrance for Valerie

##### 321 Whitmore Lab

##### 2024-04-18

On Friday, April 19th, 4-5:30pm, the IGC will host a gathering to remember the life and science of Valerie Lindner in Whitmore Lab.

4:00 | IGC | Valerie Lindner's Life and Science |

### 2024 IGC Art Showcase

##### 321 Whitmore Lab

##### 2024-04-16

The second annual IGC Art Showcase will be held on April 18th from 5-7pm. Journey through the intersection of art and science with fellow IGC members! Pizza and light refreshments will be provided.

5:00 | IGC | IGC Art Showcase |

### Neutrino Focus Session

##### Davey 339, Whitmore 320

##### 2024-04-11 - 2024-04-12

Recently the Particle Physics Prioritization Panel report emphasized the importance of neutrino physics, building on the recommendation of the Astro2020 Decadal Survey to explore multimessenger astrophysics. During the meeting we will explore the strengths in the CMA and IGC related to neutrino physics and astrophysics and look for areas of commonality. The goal is to develop a vision for joint projects, perhaps building on existing projects like AMON or developing new ones.

9:00 | Stephanie Wissel | Overview and goal setting |

9:15 | Irina Mocioiu, Kayla DeHolton, Doug Cowen, Stephanie Wissel | Flavor physics and oscillations |

10:15 | Luiz de Viveiros, Sarah Shandera, Kohta Murase | Fundamental properties and interactions of neutrinos |

9:00 | Kohta Murase, Hugo Ayala Solares, Tetyana Pitik | Multimessenger astrophysics with neutrinos |

10:15 | Jimmy DeLaunay, Stephanie Wissel | Neutrino searches, experiments/missions & MMA connections |

11:00 | Mainak Mukhopadhyay, Mukul Bhattacharya, Yi Qiu, David Radice | MeV-GeV neutrinos |

12:15 | Stephanie Wissel | Close out and action items |

### GAPP Seminar - Weak Gravitational Lensing from the Ground, the Stratosphere, and Space

##### 339 Davey Lab

##### 2024-04-09

Jacqueline McCleary, Northeastern University The standard model of cosmology (aka L+Cold Dark Matter or LCDM) has successfully explained astrophysical observations as diverse as anisotropies in the cosmic microwave background, baryon acoustic oscillations, and the flatness of galaxy rotation curves. A key phenomenon within the LCDM framework is weak gravitational lensing, which describes the small distortions of more distant galaxies due to the gravitational influence of intervening matter. Gravitational lensing is thus a direct probe of all matter, dark and baryonic, offering insights into the universe's total mass densityWM and the clustering amplitude of cosmic structures (s8). In this seminar, I will describe three very different campaigns to measure weak gravitational lensing signal from the ground (LoVoCCS), in the stratosphere (SuperBIT), and from space (COSMOS-Web). The discussion will focus on the unique features of each of these observational programs, how they advance our ability to constrainWM and s8,and what they could ultimately contribute to our evolving understanding of dark matter's role in structure formation.

14:00 | Jacqueline McCleary | Weak Gravitational Lensing from the Ground, the Stratosphere, and Space |

### Special CAMP Seminar

##### 339 Davey and https://psu.zoom.us/j/96720940863?pwd=a3FhYTdUM0dBdGRXZ3NWUzIrTmpvUT09 - Password: 804956

##### 2023-06-05

Prof. Zhida Song from Peking University will give a special CAMP seminar talk entitled: Kondo Phase in Twisted Bilayer Graphene - A Unified Theory for Distinct Experiments. Abstract: A number of interesting physics phenomena have been discovered in magic-angle twisted bilayer graphene(MATBG), such as superconductivity, correlated gapped and gapless phases, etc. The gapped phases are believed to be symmetry-breaking states described by mean-field theories. Gapless phases, however, exhibit exotic phenomena beyond naive mean-field descriptions. Such phenomena include (i) zero-energy peaks in spectral density at low temperatures, (ii) a cascade of transitions as that of a quantum dot at higher temperatures, (iii) the Pomeranchuk effect where local moment develops upon heating, (iv) resistance peaks in gapless phases at certain integer fillings, etc. These phenomena have never been connected or explained on a microscopic level by any prior theory. In this work, we point out that all these phenomena result from a simple unified mechanism- the Kondo effect. We applied systematic analytical and numerical renormalization group analyses to a singleimpurity version of the recently proposed topological heavy fermion (THF) model of MATBG. We find that the Fermi liquid ground state exhibiting (i) zero-energy peaks is stabilized by the Kondo screening effect. A higher temperature will drive the system into a local moment phase that obeys Curie’s law and has higher entropy. This explains the (ii) transition cascade, (iii) the Pomeranchuk effect, and (iv) resistance peaks. Remarkably, using realistic parameters given by the previous THF model work, the computed spectral densities, entropies, and spin susceptibilities are quantitatively comparable to experiments. Furthermore, we predict that the ground state in a wide range of fractional fillings is the heavy Fermi liquid, and compute its dispersion, quasi-particle weight, and energy surfaces that could be used to verify our theory if compared to experiments in the future studies. We conjecture that the heavy Fermi liquid is the parent state of the observed unconventional superconductivity. It is also possible that the observed “strange metal” behavior could be connected to the competition between RKKY interaction and Kondo screening.

10:15 | Zhi-Da Song | Kondo Phase in Twisted Bilayer Graphene - A Unified Theory for Distinct Experiments. |

### IGC-All Meeting

##### 538 Davey Lab

##### 2023-04-24

A debrief of the External Advisory Board's notes for the IGC. All are encouraged to attend.

14:00 | Sarah Shandera | EAB Debrief |

### Primordial Universe and Gravity (PUG) Seminar

##### 321 Whitmore Lab

##### 2023-04-21

Zhenyuan Wang - The Renormalization in Cosmological Perturbation Theory

14:00 | Zhenyuan Wang | The Renormalization in Cosmological Perturbation Theory |

### Special Condensed Atomic Molecular Physics (CAMP) Seminar

##### 318 Osmond

##### 2023-04-21

Yihang Zeng - Interplay between Correlation and Topology in TMD Moiré Materials

10:00 | Yihang Zeng | Interplay between Correlation and Topology in TMD Moiré Materials |

### Physics Colloquium - Eklund Award winners Ish Gupta and Marius Jürgensen

##### 101 Osmond and https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2023-04-20

The 2023 Peter Clay Eklund Lecture Awards for Scientific Communication

15:45 | Ish Gupta and Marius Jürgensen | 2023 Peter Clay Eklund Lecture Awards for Scientific Communication |

### Primordial Universe and Gravity (PUG) Seminar

##### 321 Whitmore Lab

##### 2023-04-14

Shio Sakon, topic to be announced

14:30 | Shio Sakon | Topic TBA |

### Gravity, Astroparticle and Particle Physics (GAPP) Seminar

##### 320 Whitmore Lab

##### 2023-04-14

Anuradha Gupta, Extracting Astrophysics from Spin Precession in Binary Black Holes

11:00 | Anuradha Gupta | Extracting Astrophysics from Spin Precession in Binary Black Holes |

### Physics Colloquium

##### 101 Osmond

##### 2023-04-13

Steven Prohira, Ultrahigh Energy Neutrino Detection...with Radar?

15:45 | Steven Prohira | Ultrahigh Energy Neutrino Detection...with Radar? |

### Condensed Atomic Molecular Physics (CAMP) Seminar

##### 339 Davey Lab

##### 2023-04-10

Xifan Wu, Unravelling the Mystery of Water and Aqueous Solutions by Theories of both Electronic Ground State and Excitation

15:45 | Xifan Wu | Unravelling the Mystery of Water and Aqueous Solutions by Theories of both Electronic Ground State and Excitation |

### Center for Fundamental Theory Meeting

##### 538 Davey Lab

##### 2023-04-10

A discussion of the connections between IGC centers and the new directions the Center could go in.

14:00 | Martin Bojowald and Jacob Bourjaily | The CFT's new directions? |

### Friedman Lecture - John Mather

##### 100 Thomas

##### 2023-04-08

On Saturday April 8, the Astro Department is hosting a very unusual outreach visitor: Dr. John C. Mather, chief scientist of the James Webb Space Telescope and winner of the 2006 Nobel Prize in Physics for cosmology. Dr. Mather will be our 2023 Friedman Lecturer in Astronomy speaking to the public and University communities on JWST. This is expected to be the Department's largest outreach event in years. Breakfast will be held at 8:45-9:45AM in 114 McAllister. If you'd like to join for breakfast, please sign in here: https://docs.google.com/spreadsheets/d/1IzpPAspJ0KgsKI_lPwzZk5_e2fXQWDTg05JVMmNGQpw/edit#gid=0 A few small groups of researchers or students can meet with Dr. Mather from 10-12:00PM in 432 Davey. If you are interested, please send an email by Monday, the 27th, with your attendees to Drs. Feigelson and McEntaffer. Dr. Mather will give the public 2023 Friedman Lecture in Astronomy in 100 Thomas from 2:30-3:30pm. Please attend with friends and families.

14:30 | John Mather | Friedman Lecture |

### International Loop Quantum Gravity Seminar

##### https://lsu.zoom.us/j/97017759448?pwd=WG14eG9XdHJqVlZncHJCa1c0OFc3dz09

##### 2023-04-04

LQC of Black Holes in Loop Quantum Gravity, Beatriz Elizaga, LSU

10:00 | Beatriz Elizaga | LQC of Black Holes in Loop Quantum Gravity |

### CMA Meeting

##### 538 Davey Lab

##### 2023-04-03

News updates - We will have coffee and snacks, and everyone is welcome to come

14:00 | Miguel Mostafa | News updates |

### Physics Colloquium - Zolton Fodor

##### 339 Davey and https://psu.us8.list-manage.com/track/click?u=4226e3ef532a8590ae62886fb&id=beab6e7bef&e=9148850abf

##### 2023-04-03

The Anomalous Magnetic Moment of the Muon

15:45 | Zolton Fodor | The Anomalous Magnetic Moment of the Muon |

### Primordial Universe and Gravity (PUG) Seminar

##### 321 Whitmore Lab

##### 2023-03-31

Jackson henry - Title and Abstract to be circulated later this week

14:30 | Jackson Henry | Title TBA |

### Physics Colloquium - Zvi Bern

##### 101 Osmond and https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2023-03-30

Title: From Quantum Scattering Amplitudes to Gravitational Waves Abstract: The remarkable detection of gravitational waves by the LIGO/Virgo collaboration has opened a new window into the cosmos. In this colloquium we explain how particle theorists can help out with calculations directly relevant for gravitational-wave emission from compact astrophysical objects. The past decade has seen enormous advances in our ability to compute quantum scattering amplitudes making seemingly impossible calculations tractable. These advances include ideas such as the duality between color and kinematics, double-copy relations, generalized unitarity, and improved integration methods. The starting point in this approach is that gravity is transmitted by a massless spin 2 particle. After introducing these concepts, we explain how these ideas are transferred to produce new state-of-the-art calculations for the astrophysical binary black hole inspiral problem.

15:45 | Zvi Bern | From Quantum Scattering Amplitudes to Gravitational Waves |

### Special Condensed Atomic Molecular Physics (CAMP) Seminar - Xiaoliang Qi, Stanford

##### 339 Davey Lab

##### 2023-03-27

Title: Spacetime Mutual Information Abstract: Most quantum information measures are defined for quantum states. For example, mutual information measures the correlation between two subsystems in a quantum state. It is natural to ask whether correlation in spacetime can be characterized by some generalization of mutual information. In this work, we propose a space-time generalization of mutual information. The key idea is to consider a general "quantum experiment" that measures the correlation between two space-time regions, and use the setup of hypothesis testing. We discuss various properties of the spacetime mutual information, including how it provides an upper bound for all connected correlation functions, which is a direct generalization of the similar property of ordinary mutual information.

10:00 | Xiaoliang Qi | Spacetime Mutual Information |

### Condensed Atomic Molecular Physics (CAMP) Seminar - Ilya Sochnikov

##### 339 Davey Lab

##### 2023-03-27

Title: Tunable Magnetic Domains and Walls in a Noncentrosymmetric Ferromagnetic Weyl Semimetal Abstract: In Weyl semimetals, chirality is a new degree of freedom that has great potential for fundamental physics as well as for the development of new devices for storing and processing information. The combination of the topology of the Weyl fermions with magnetism is particularly attractive: magnetic Weyl materials are predicted to exhibit electromagnetic properties transformed by emergent gauge axial fields. To advance this field of research, it is essential to understand the detailed magnetic domains physics of these materials. In this study, we investigated spontaneous magnetization and magnetic susceptibility of a non-centrosymmetric ferromagnetic (FM) Weyl semimetal: CeAlSi

15:45 | Ilya Sochnikov | Tunable Magnetic Domains and walls in a Noncentrosymmetric Ferromagnetic Weyl Semimetal |

### Center for Theoretical and Observational Cosmology Meeting

##### 538 Davey Lab

##### 2023-03-27

Jahmour Givans, a visiting postdoc and FFPS fellow at Princeton, will give a brief, informal presentation on "Modeling the Lyman-alpha forest autocorrelation and its cross-correlation with dark matter halos". Coffee and snacks will be provided as usual.

14:00 | Jahmour Givans | Modeling the Lyman-alpha forest autocorrelation and its cross-correlation with dark matter halos |

### Primordial Universe and Gravity (PUG) Seminar

##### 321 Whitmore

##### 2023-03-24

Michael Plesser - Amplitudes beyond QFT: Correcting Coulomb and Newton with On-Shell Methods

14:00 | Michael Plesser | Amplitudes beyond QFT: Correcting Coulomb and Newton with On-Shell Methods |

### Physics Colloquium - Visualizing Many Body Quantum States in Magical Flat Bands

##### 101 Osmond and Zoom: https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2023-03-23

Ali Yazdani, University of Princeton

15:45 | Ali Yazdani | Visualizing Many Body Quantum States in Magical Flat Bands |

### Astro Colloquium - Data At Your Fingertips: Using Citizen Science in Undergraduate Astronomy Classrooms

##### 538 Davey Lab

##### 2023-03-22

Molly Simon - With big data on the rise, research teams across a multitude of disciplines are left with more data than they have time to analyze independently. Citizen science is an invaluable tool that involves crowdsourcing aspects of the data analysis process, enabling these research teams to solve problems involving large quantities of data more efficiently while simultaneously taking advantage of the inherently human talent for pattern recognition and anomaly detection.

15:45 | Molly Simon | Data At Your Fingertips: Using Citizen Science in Undergraduate Astronomy Classrooms |

### Condensed Atomic Molecular Physics (CAMP) Seminar - Quantum Phenomena in the Landau Levels of Atomically-Thin Transition Metal Dicalcogenides

##### Zoom: https://psu.zoom.us/j/96178311702?pwd=bWNHRXE5QUdkbTVEY1F3dFlhR3JvZz09

##### 2023-03-20

Landau levels offer a neat model system to study emergent quantum phases, owing to the dominating Coulomb interactions and tunable orbital wavefunctions. In atomically-thin transition metal dicalcogenide, the well-resolved and -controlled spin, valley and layer degree of freedom further enriches the physics that can be explored. In this talk, I’ll discuss a few examples in WSe2: first, a bilayer WSe2 allows selective carrier population of the individual layers; when the filling factor of the two layers is an integer number, it manifests as a natural platform for interlayer exciton condensate. Second, a large imbalance in the population of two (pseudo)spins gives rise to spin-dependent transport in partially filled Landau levels - the spin-minority carriers are much less mobile than the spin-majority carriers. We explain such behavior using a polaron picture.

15:45 | Qianhui Shi | Quantum Phenomena in the Landau Levels of Atomically-thin Transition Metal Dicalcogenides |

### IGC-all Meeting

##### 538 Davey Lab

##### 2023-03-20

Details about upcoming IGC events, including the Neighborhood Workshop, Art Showcase and External Advisory Board Meetings will be given. Coffee and snacks will be provided.

14:00 | Sarah Shandera | IGC-all Meeting |

### Gravity, Astroparticle and Particle Physics (GAPP) Seminar

##### 320 Whitmore Lab

##### 2023-03-17

I will explore the possibility that the couplings describing the strengths of the Standard Model gauge forces take different values at very early times. As I will show, such a scenario is typically consistent with current observations if the variation happens early enough, and can cause us to radically rethink processes such as dark matter production or the generation of the matter-anti-matter asymmetry.

11:00 | Tim Tait | Dynamical Couplings in the Early Universe |

### Primordial Universe and Gravity (PUG) Seminar

##### 321 Whitmore

##### 2023-03-17

Rahul Kashyap, Relativistic Rotating Stars

14:00 | Rahul Kashyap | Relativistic Rotating Stars |

### Physics Colloquium

##### 101 Osmond and https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2023-03-16

I will discuss the need to extend the Standard Model of particle physics in order to describe the dark matter, a mysterious substance whose existence can be inferred from cosmological measurements, but whose fundamental nature remains unknown. I’ll discuss how a broad strategy of searching for dark matter using techniques from particle physics and astronomy maximize our chances of successfully discovering its identity, and what this could mean for future research in particle physics.

15:45 | Tim Tait | Casting a Wide Net for Dark Matter |

### Astro Colloquium

##### 538 Davey Lab

##### 2023-03-15

Data is one of the fundamental quantities on which progress in astronomy is predicated. Yet there is often a disproportionate emphasis on immediate science results over the development of robust methods to process and even model the underlying data. In this talk I will present a case study demonstrating the benefits of investing in modern software development for data modeling – the challenge of imaging in radio interferometry. I will first overview the standard approach to imaging, wherein telescopes such as ALMA are purpose-built to observe at generational resolution and sensitivity, while the software that images the data uses an empirical, decades-old modeling framework that does not leverage the highest resolution and sensitivity information. Then I will discuss two modern, open-source software packages designed to perform imaging more accurately, quickly and autonomously, within a simple and well-documented software architecture. Comparing their performance on ALMA observations of protoplanetary disks to the standard imaging approach, I will show how these algorithms employ statistical techniques to simultaneously achieve higher resolution and sensitivity in their reconstructed images. Finally I will preview the new science these tools are driving in the protoplanetary disk field, including the Bayesian inference made possible by self-consistently imaging hundreds of datasets at high fidelity.

15:45 | Jeff Jennings | The Scientific Utility of Software Development: a Case Study in Radio Interferometry |

### Noncommutative Geometry Weekly Seminar

##### Whitmore 320

##### 2023-03-14

Weekly seminar meeting to explore locally-relevant research topics in noncommutative geometry in the context of mathematical physics under the connes program.

2:30 | Et. Al. | Noncommutative Geometry Seminar |

### Center for Fundamental Theory Meeting

##### 538 Davey Lab

##### 2023-03-13

Discussion topics will include center visibility, the center's description text, so-called "mini-courses" for faculty members to introduce their research. Coffee and bagels will be provided, and, as always, all IGC members are encouraged to attend.

14:00 | Jacob Bourjaily and Martin Bojowald | CFT Mini-course Discussion |

### Condensed Atomic Molecular Physics (CAMP) Seminar

##### 339 Davey Lab

##### 2023-03-13

Speaker: Debanjan Chowdhury, Cornell Title: Useful Bounds on Superconducting Tc Abstract: Superconductivity in the limit of a vanishing bandwidth in isolated bands is a classic example of a non-perturbative problem, where BCS theory does not apply. What sets the superconducting phase stiffness, and relatedly the transition temperature, in this limit is of both fundamental and practical interest. This question has become especially relevant with the discovery of superconductivity in moiré materials. I will begin by examining critically the relevance of various proposed bounds on the superconducting transition temperature and propose a non-perturbative upper bound on the integrated optical spectral weight for partially filled electronic flat bands with generic density-density interactions. I will also present numerically exact results for the interplay between superconductivity and various competing orders in models of interacting flat-bands.

15:45 | Debanjan Chowdhury | Useful Bounds on Superconducting Tc |

### GAPP Seminar

##### 320 Whitmore

##### 2023-03-03

Maria Babiuc Hamilton

11:00 | Maria Babiuc Hamilton | Beyond Infinity: PITTNULL Code and the Cauchy-characteristic Extraction of Gravitational Waves |

### CEHW Seminar

##### 538 Davey Lab

##### 2023-02-27 - 2023-03-03

Emily Rickman, Combining Exoplanet Measurement Techniques to Discover, Weigh and Characterize Cold Gas Giants

11:00 | Emily Rickman | Combining Exoplanet Measurement Techniques to Discover, Weigh and Characterize Cold Gas Giants |

### Physics Colloquium

##### 101 Osmond

##### 2023-03-02

Adam Kaufman, Programmable Control of Indistinguishable Particles: From Sampling to Clocks to Qubits

15:45 | Adam Kaufman | 101 Osmond |

### CMA-All Meeting

##### 538 Davey Lab

##### 2023-02-27

Center funding proposals, an update on LIGO O4, and thermal effects in binary neutron star mergers.

14:00 | Miguel Mostafa | Proposals, LIGO Update, and Thermal Effects in Neutron Star Mergers |

### PUG Seminar

##### 321 Whitmore

##### 2023-02-24

Mary Ogborn, title to be announced

14:00 | Mary Ogborn | Title to be announced |

### Black History Month 2023 Keynote - Moogega Cooper

##### 100 Huck Life Sciences Building

##### 2023-02-23

Diversity in STEAM from a Real-Life Guardian of the Galaxy

17:00 | Moogega Cooper | Diversity in STEAM from a Real-Life Guardian of the Galaxy |

### Physics Colloquium

##### 101 Osmond

##### 2023-02-23

Zohar Komargodski, Semi-Classical Limits at Large Quantum Numbers

15:45 | Zohar Komargodski | Semi-Classical Limits at Large Quantum Numbers |

### Astro Colloquium

##### 538 Davey Lab

##### 2023-02-22

Kailash C. Sahu, First Detection and Mass Measurement of an Isolated Black Hole through Astrometric Microlensing

15:45 | Kailash C. Sahu | First Detection and Mass Measurement of an Isolated Black Hole through Astrometric Microlensing |

### CEHW Seminar

##### 12:30pm

##### 2023-02-20

Andrew Pellegrino, DIAmante TESS Autoregressive Planet Search (DTARPS) Year 2

12:30 | Andrew Pellegrino | DIAmante TESS Autoregressive Planet Search (DTARPS) Year 2 |

### IGC-All Meeting

##### 538 Davey Lab

##### 2023-02-20

Introductions for new members and visitors, upcoming proposal meetings, and information about the postdoc and student poster event.

14:00 | Sarah Shandera | Introductions and Updates |

### CAMP Seminar

##### 339 Davey Lab

##### 2023-02-20

Katja Nowack, Understanding Electronic Transport through Local Magnetic Measurements

14:45 | Katja Nowack | Understanding Electronic Transport through Local Magnetic Measurements |

### GAPP Seminar

##### 320 Whitmore

##### 2023-02-17

Pietro Dona, An Overview of Covariant Loop Quantum Gravity

11:00 | Pietro Dona | An Overview of Covariant Loop Quantum Gravity |

### PUG Seminar

##### 321 Whitmore Lab

##### 2023-02-17

Victoria Niu, A Discovery of Coleman’s False Vacuum Decay and its Cosmological Impact.

14:00 | Victoria Niu | Topic to be announced |

### GAPP Seminar - Pietro Dona

##### 320 Whitmore

##### 2023-02-17

GAPP SEMINAR (Gravity, Astroparticle & Particle Physics) Friday, February 17th 11:00 am, 320 Whitmore Zoom link: https://psu.zoom.us/j/93737760341?pwd=Qlc4bWFDU0taSHhJK0RHeWMvendHZz09 Meeting: 937 3776 0341 Passcode: 150786 Speaker: Pietro Dona (CSTQ, Marseille) Title: An Overview of Covariant Loop Quantum Gravity Abstract: Covariant loop quantum gravity (or spin foam theory) defines a background-independent Lorentzian path integral for gravity. I will review its formulation and highlight its successes, open questions, and physical applications. Numerical calculations have been a major driving force in recent developments. I will overview the leading frameworks, their ingredients, and regimes of validity.

11:00 | Pietro Dona | An Overview of Covariant Loop Quantum Gravity |

### Astro Colloquium

##### 538 Davey Lab

##### 2023-02-15

The Proposed STAR-X MIDEX Mission: Studying The Fast, Furious and Forming Universe in the X-ray and UV

15:45 | Ann Hornschemeier Cardiff | The Proposed STAR-X MIDEX Mission: Studying The Fast, Furious and Forming Universe in the X-ray and UV |

### NCG Student Seminar

##### 320 Whitmore

##### 2023-02-14

Brief talks on NCG provided by graduate students.

2:30 | Jacob Brad | NCG talk #3 |

### CAMP Seminar

##### 339 Davey Lab

##### 2023-02-13

Martin Claassen, Topology and Light-Matter Interactions in Moiré Heterostructures

2:00 | Martin Claassen | An (Over)view of Covariant Loop Quantum Gravity |

### Shared CEHW Seminar

##### 538 Davey Lab

##### 2023-02-13

Tyler Richey-Yowell The UV and X-Ray Evolution of Low-Mass Stars Aishwarya Iyer The SPHINX Grid: New Model Atmospheres to Derive Fundamental M-Dwarf Properties Nuri Park Connecting Coronal Mass Ejections (CMEs) to Far-Ultraviolet Flares Peter Smith S'more Roasting Marshmallows - The Atmosphere of WASP-121 b is 13CO-enriched

11:15 | Tyler Richey-Yowell, Aishwarya Iyer, Nuri Park, Peter Smith | Shared Virtual Seminar |

### PUG Seminar

##### 321 Whitmore

##### 2023-02-10

Erick Munio Garcia, Thermodynamics from Entanglement in QFT

14:00 | Erick Munio Garcia | Thermodynamics from Entanglement in QFT |

### Astro Colloquium

##### 538 Davey Lab

##### 2023-02-08

Kristen McQuinn, Galaxy Evolution at the Faint-End of the Luminosity Function

17:00 | Kristen McQuinn | Galaxy Evolution at the Faint-End of the Luminosity Function |

### ILQGS - Panel on black holes in LQG

##### 339 Davey Lab

##### 2023-02-07

International Loop Quantum Gravity Seminar Title: Panel on black holes in LQG Speakers: Muxin Han, Parampreet Singh, Ed Wilson-Ewing, Viqar Husain (Chair) Time & Location: 10am, 339 Davey Lab Zoom Link: https://lsu.zoom.us/j/97017759448?pwd=WG14eG9XdHJqVlZncHJCa1c0OFc3dz09

10:00 | Muxin Han, Parampreet Singh, Ed Wilson-Ewing, Viqar Husain (Chair) | Panel on black holes in LQG |

### CTOC Meeting

##### 538 Davey Lab

##### 2023-02-06

CTOC-focused meeting led by Donghui Jeong, focusing on research updates.

14:00 | Donghui Jeong | CTOC Meeting |

### Camp Seminar

##### 339 Davey Lab

##### 2023-02-06

Suguru Yoshida, Atomic Displacements in Crystals: What Occurs and Why

15:45 | Suguru Yoshida | Atomic Displacements in Crystals: What Occurs and Why |

### PUG Seminar

##### 321 Whitmore Lab

##### 2023-02-03

James Kennington

14:00 | James Kennington | TBA |

### Physics Colloquium

##### 101 Osmond

##### 2023-02-02

Riccardo Penco, From Black Holes to Superfluidity: Effective Theories of Point-Like Particles

15:45 | Riccardo Penco | From Black Holes to Superfluidity: Effective Theories of Point-Like Particles |

### JWST: From First Light to First Science

##### 538 Davey Lab and https://psu.zoom.us/j/92637070419

##### 2023-02-01

Marshall Perrin Abstract: After decades of development by a globe-spanning team, JWST is now providing an unprecedented view of the cosmos. In this talk I will describe our experience thus far operating this new great observatory: from mission design history and development, to prelaunch preparations, to launch and commissioning, and now into the first of many years of mission operations at the Earth-Sun L2 point. I will provide a first-hand look at the processes and teamwork we used to deploy the observatory and align its segmented mirror system, and discuss some of the surprises (both challenges and good news) encountered during commissioning. Even from early in telescope commissioning, this observatory's tremendous power and sensitivity were already apparent with spectacular images and spectra. Now during science operations, we continue to learn more about observatory hardware performance; this is still early days in our adventure with JWST. I will close with a look at (a small fraction of) some of the early science results with JWST, with particular attention to our early imaging observations of nearby exoplanetary systems.

15:45 | Marshall Perrin | JWST: From First Light to First Science |

### CAMP Seminar

##### 339 Davey Lab

##### 2023-01-30

He Zhao - Smectic Pair Density Wave Order in EuRbFe4As4

15:45 | He Zhao | Smectic Pair Density Wave Order in EuRbFe4As4 |

### PUG Seminar

##### 321 Whitmore Lab

##### 2023-01-27

Kokkimidis Patatoukos

14:00 | Kokkimidis Patatoukos | Title TBA |

### GAPP Seminar

##### 320 Whitmore Lab

##### 2023-01-27

Alexander Edison, Northwestern University

11:00 | Alexander Edison | Title TBA |

### International Loop Quantum Gravity Seminar

##### 339 Davey Lab and https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

##### 2023-01-24

Hanno Stahlmann presents a talk entitled "Chiral Super Loop Quantum Gravity"

10:00 | Jorge Sofo | Chiral Super Loop Quantum Gravity |

### International Loop Quantum Gravity Seminar

##### Whitmore 320

##### 2023-01-24

International Loop Quantum Gravity Seminar Hanno Sahlmann (FAU Erlangen) Chiral Super LQG 2023-01-24 at 10:00 Whitmore 320 Zoom: https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

10:00 | Hanno Sahlmann | Chiral Super LQG |

### Katie Mack to Present SAGF Lecture

##### Foster Auditorium, Paterno Library

##### 2023-01-23

Dr. Katie Mack is a theoretical astrophysicist exploring a range of questions in cosmology, the study of the universe from beginning to end. She currently holds the position of Hawking Chair in Cosmology and Science Communication at the Perimeter Institute for Theoretical Physics, where she carries out research on dark matter and the early universe and works to make physics more accessible to the general public. She is the author of the book “The End of Everything (Astrophysically Speaking)” and has written for a number of popular publications, such as Scientific American, Slate, Sky & Telescope, Time, and Cosmos magazine. She can be found on twitter as @AstroKatie.

13:00 | Katie Mack | Physics at the End of the Universe |

### CAMP Seminar

##### 339 Davey Lab

##### 2023-01-23

Jorge Sofo presents a talk entitled "Generalized Quantum Langevin Equation for Transport: The Case for Interband Coherences in the Electrical Conductivity" in 339 Davey Lab. Refreshments will be provided.

15:45 | Jorge Sofo | Generalized Quantum Langevin Equation for Transport: The Case for Interband Coherences in the Electrical Conductivity |

### Conference for Undergraduate Women in Physics

##### HUB Center

##### 2023-01-20 - 2023-01-22

Penn State is one a site for the 2023 CUWiP, a student-organized, APS supported conference for undergraduate women in physics. The featured speakers include accomplished IGC alums Dr. Sydney Chamberlin and Dr. Azadeh Keviani in the Explorers Talk Series. IGC will also host invited speaker Dr. Katie Mack, Hawking Chair in Cosmology and Science Communication at the Perimeter Institute for Theoretical Physics, for an extended visit following her talk in the CUWiP Explorers Series. More details about the event can be found at https://sites.psu.edu/cuwip2023/.

9:45 | Katie Mack | |

11:30 | Azadeh Keivani | |

9:00 | Sydney Chamberlin |

### GAPP Seminar - Dhruv Desai

##### 339 Davey and https://psu.zoom.us/j/93737760341?pwd=Qlc4bWFDU0taSHhJK0RHeWMvendHZz09

##### 2022-12-13

Title: GRMHD Simulations of Neutrino-Driven Winds From Proto-Neutron Stars Abstract: Formed in the aftermath of a core-collapse supernova or neutron star merger, hot proto-neutron stars (PNSs) launch neutrino-driven winds within milliseconds, with the winds themselves lasting for tens of seconds. The PNS wind has long been considered a potential site for the nucleosynthesis of heavy elements (Z>60) via the rapid neutron capture process (r-process). Previous work has found that such winds are not favorable for r-process element production. I will present results of general relativistic magnetohydrodynamic simulations of the PNS wind with weak interactions, advanced microphysics and neutrino absorption. I will discuss how physical mechanisms of rapid rotation and strong magnetic fields of a PNS may independently affect wind dynamics and how these effects may change r- process viability.

13:30 | Dhruv Desai | GAPP: GRMHD Simulations of Neutrino-Driven Winds From Proto-Neutron Stars |

### CTOC Meeting

##### 538 Davey Lab

##### 2022-12-12

14:00 | Donghui Jeong | CTOC Meeting |

### PUG Seminar - James Gurian

##### 321 Whitmore

##### 2022-12-09

Title: Zero Metallicity in Zero CPU Hours Abstract: I will begin with a pedagogical review of the theory of the formation of the first stars and the current open questions in the field. I will then present a new, analytic model for the formation of these stars which clarifies the essential physics. Despite its simplicity, this model agrees with the stellar mass predicted by expensive radiation-hydrodynamical simulations to within a factor of a few over the entire relevant parameter space.

14:00 | James Gurian | Topic to be announced |

### Astro Colloquium

##### 538 Davey Lab and https://psu.zoom.us/j/92637070419

##### 2022-12-07

Galactic Archaeology in the Era of Large Surveys

15:45 | Keith Hawkins | Galactic Archaeology in the Era of Large Surveys |

### Special ILQGS

##### 320 Whitmore and https://psu.zoom.us/j/94818831322

##### 2022-12-07

Series: Special ILQGS Speaker: Fabio Mele (OIST) Title: Quantum frame relativity of subsystems, correlations, and (thermo)dynamics Time: 2:30pm, Wed, Dec.7th Room: 320 Whitmore Zoom (hybrid): https://psu.zoom.us/j/94818831322

14:30 | Fabio Mele | Quantum frame relativity of subsystems, correlations, and (thermo)dynamics |

### No MAPchat this week

##### 2022-12-06

16:00 | James Kennington | MAPchat postponed |

### International Loop Quantum Gravity Seminar

##### 318 Osmond

##### 2022-12-06

Series: ILQGS Speaker: Qian Chen (ENS Lyon) Title: Entanglement in spin network states Time: 10am, Tue, Dec.6th Room: 318 Osmond Zoom (hybrid): https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

10:00 | Qian Chen | Entanglement in Spin Network States |

### Workshop on Higher Structures

##### 114 McAllister

##### 2022-12-01 - 2022-12-04

The workshop will start around 2:00pm on Thursday, December 1 and end around noon on Sunday, December 4. No registration is required and all IGC members are encouraged to attend. Please see the event page for more information: https://personal.psu.edu/mps16/2022_PSU_workshop.html

14:00 | Ping Xu | Workshop on Higher Structures |

### Physics Colloquium - Ivan Agullo

##### 101 Osmond and https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2022-12-01

Analog Gravity, Hawking Radiation, and Quantum Information

15:45 | Ivan Agullo | Analog Gravity, Hawking Radiation, and Quantum Information |

### Astro Colloquium - Mark Vogelsberger

##### 538 Davey Lab and https://psu.zoom.us/j/92637070419

##### 2022-11-30

Simulating Early Structure and Galaxy Formation - The THESAN Project

15:45 | Mark Vogelsberger | Simulating Early Structure and Galaxy Formation - The THESAN Project |

### GAPP Seminar: On Entanglement in Quantum Field Theory

##### 339 Davey Lab, and Zoom: https://psu.zoom.us/s/93737760341

##### 2022-11-29

Speaker: Ivan Agullo (LSU) Title: On Entanglement in Quantum Field Theory Abstract: It is believed that even the simplest states in the simplest field theories are highly entangled. The main support for this statement comes from the Reeh-Schlieder theorem and calculations of entanglement entropy between a region of space and its complement. I will argue that these results do not provide much information about the entanglement between individual local degrees of freedom. I will then present a way of quantifying such entanglement and show that entanglement in field theory is significantly less ubiquitous than it is commonly believed.

13:30 | Ivan Agullo | On Entanglement in Quantum Field Theory |

### MAPchat - Samuel Wallace

##### 320 Whitmore Lab

##### 2022-11-29

Weak Convergence of PDE's

16:00 | Samuel Wallace | Weak Convergence of PDE's |

### CFT Meeting

##### 538 Davey Lab and https://psu.zoom.us/j/94790584999?pwd=RXJNa21jNmRxTFo0VHBWdlpCc3Nhdz09 (Password: 827251)

##### 2022-11-28

A discussion of the center's goals and priorities, and a review of the center's description.

14:00 | Jacob Bourjaily and Martin Bojowald | A discussion of the center's goals and priorities, and a review of the center's description. |

### CEHW Seminar - Hareesh Bhaskar

##### https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

##### 2022-11-28

Mildly-Hierarchical Triple Dynamics and Applications to the Outer Solar System

10:00 | Hareesh Bhaskar | Mildly-Hierarchical Triple Dynamics and Applications to the Outer Solar System |

### International Loop Quantum Gravity Seminar

##### Online (Zoom Only) https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

##### 2022-11-22

Eugenio Bianchi, Kristina Giesel, Eduardo Martin-Martinez, Ivan Agullo (Chair) Title: Panel on Quantum Information and Quantum Gravity https://relativity.phys.lsu.edu/ilqgs/ Online (Zoom Only)

10:00 | Eugenio Bianchi, Kristina Giesel, Eduardo Martin-Martinez, Ivan Agullo | Panel on Quantum Information and Quantum Gravity |

### PUG Seminar - Ish Gupta

##### 320 Whitmore

##### 2022-11-18

Speaker: Ish Gupta Title: Lensing of Gravitational Waves

14:00 | Ish Gupta | Lensing of Gravitational Waves |

### Astro Colloquium - Rachael Mandelbaum

##### 538 Davey Lab and Zoom: https://psu.zoom.us/j/92637070419

##### 2022-11-16

Speaker: Rachael Mandelbaum, Carnegie Mellon Title: Weak Lensing with the Hyper Suprime-Cam Survey – and Beyond!

15:45 | Rachael Mandelbaum | Weak Lensing with the Hyper Suprime-Cam Survey – and Beyond! |

### MAPchat - Michael Plesser

##### 320 Whitmore

##### 2022-11-15

Michael Plesser - Why Good Variables Matter: Representations of Poincare with Additional Structure

16:00 | Michael Plesser | Why Good Variables Matter: Representations of Poincare with Additional Structure. |

### CMA Meeting

##### 538 Davey Lab and https://psu.zoom.us/j/94790584999?pwd=RXJNa21jNmRxTFo0VHBWdlpCc3Nhdz09 (Password: 827251)

##### 2022-11-14

Finishing research updates, and a discussion on the center's purpose.

14:00 | Hugo Alberto Ayala Solares | Research Presentations and a Discussion About the Role of the Center |

### PUG Seminar - Mauricio Gamonal

##### 321 Whitmore

##### 2022-11-11

Dealing with Higher Order Derivatives: From Particles to Cosmology

14:00 | Mauricio Gamonal | Dealing with Higher Order Derivatives: From Particles to Cosmology |

### Physics Colloquium - Ashutosh Kotwai

##### 101 Osmond and https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2022-11-10

The Heavyweight W Boson - An Upset to the Standard Model of Particle Physics

15:05 | Ashutosh Kotwai | An Upset to the Standard Model of Particle Physics |

### Astro Colloquium - Josh Peek

##### 538 Davey Lab and https://psu.zoom.us/j/92637070419

##### 2022-11-09

The Interstellar Medium Beyond 3 Dimensions

15:45 | Josh Peek | The Interstellar Medium Beyond 3 Dimensions |

### GAPP: Development and Construction of the High-Energy Light Isotope Experiment

##### 339 Davey and Zoom: https://psu.zoom.us/s/93737760341

##### 2022-11-08

Lucas Beaufore, University of Chicago The High Energy Light Isotope eXperiment (HELIX) is a balloon-borne magnet spectrometer which seeks to address critical questions in cosmic ray physics by measuring the chemical and isotopic abundances of key light isotopes in the cosmic ray flux. One such measurement, that of the ratio of Be-10/Be-9, will provide strong discrimination between cosmic ray propagation models. In its first of two planned flights, HELIX will measure these abundances up to the ~3 GeV/n region. The instrument consists of a 1T superconducting magnet, a gas particle tracking system placed in the bore of the magnet, an aerogel RICH with a focal plane made of Silicon Photomultipliers (SiPMs), a scintillating fiber hodoscope, and a scintillating paddle time-of-flight system. This talk will cover the design, construction, and calibration of HELIX's novel RICH as well as a brief overview of HELIX's payload.

13:30 | Lucas Beaufore | Development and Construction of the High-Energy Light Isotope Experiment |

### MAPchat - Garett Wendell

##### 320 Whitmore

##### 2022-11-08

Calculation of Variances Behind Likelihood-free Inference

16:00 | Garett Wendell | Calculation of Variances Behind Likelihood-free Inference |

### International Loop Quantum Gravity Seminar

##### 318 Osmond and Zoom: https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

##### 2022-11-08

Mehdi Assanioussi (University of Warsaw) Title: Matter in LQG https://relativity.phys.lsu.edu/ilqgs/

10:00 | Mehdi Assanioussi | Matter in LQG |

### PUG Seminar - Jacob Fields

##### 321 Whitmore Lab

##### 2022-11-04

The Thermal Effects of the Nuclear Equation of State on Binary Neutron Star Mergers

14:00 | Jacob Fields | PUG Seminar |

### Astro Hybrid Colloquium - Revealing the First Billion Years in the James Webb Era

##### 538 Davey and https://psu.zoom.us/j/92637070419

##### 2022-11-02

Eli Visbal, The University of Toledo

15:45 | Eli Visbal | Revealing the First Billion Years in the James Webb Era |

### GAPP Seminar - The Search for Electromagnetic Counterparts to High-Energy Neutrinos

##### 339 Davey and Zoom: https://psu.zoom.us/s/93737760341

##### 2022-11-01

Robert Stein, Caltech

13:30 | Robert Stein | The Search for Electromagnetic Counterparts to High-Energy Neutrinos |

### MAPchat Seminar

##### 320 Whitmore Lab

##### 2022-11-01

An Introduction to the Poincare Group

16:00 | Joshua Black | An Introduction to the Poincare group |

### IGC-All Meeting

##### 538 Davey and https://psu.zoom.us/j/94790584999?pwd=RXJNa21jNmRxTFo0VHBWdlpCc3Nhdz09 (Password: 827251)

##### 2022-10-31

This week's IGC-All meeting is focused on networking and professional development for graduate students and postdocs. Attendees are welcome to posit agendas on the bulletin board: https://whiteboard.office.com/me/whiteboards/p/c3BvOmh0dHBzOi8vcGVubnN0YXRlb2ZmaWNlMzY1LW15LnNoYXJlcG9pbnQuY29tL3BlcnNvbmFsL3NlczQ3X3BzdV9lZHU%3d/b!w_jBzRYdq0-LOpzSFrS3Eu3IYN25SfhEoptSmuEawzT6csUIdCuhTbzcAzclWJ0j/017VD7SAEKESEPTAI2DRFJJNV2ROG5536C?ct=1667182743896&or=OWA-NT&cid=c956db36-0f2f-287c-4f67-bdf722823c86

14:00 | Sarah Shandera | IGC-All Meeting |

### Physics Colloquium - Liang Fu

##### 538 Davey Lab and Zoom: https://psu.zoom.us/j/93946951319?pwd=dFVHR21XbDExR0JQanNBUldENEFvQT09

##### 2022-10-27

Liang Fu presents on the topological state in the Mott insulator

16:45 | Liang Fu | The Topological State of the Mott Insulator |

### Astronomy Colloquium - Eugene Chiang

##### 538 Davey Lab and Zoom: https://psu.zoom.us/j/92637070419

##### 2022-10-26

Eugene Chiang gives a primer on planet formation

17:00 | Eugene Chiang | A Primer on Planet Formation |

### International Loop Quantum Gravity Seminar

##### 318 Osmond and Zoom: https://lsu.zoom.us/j/91721836632?pwd=OUpQdE52YmYwMW0vUWhBSHdRTmJtQT09

##### 2022-10-25

Abhay Ashtekar on quantum field theory and space-like singularities.

10:00 | Abhay Ashtekar | Quantum field theory and space-like singularities |

### GAPP Seminar: The Equation of State of QCD: Status and Perspectives

##### 339 Davey Lab, and Zoom: https://psu.zoom.us/s/93737760341

##### 2022-10-25

Claudia Ratti, University of Houston, discusses quantum chromodynamics simulations.

13:30 | Claudia Ratti | The Equation of State of QCD: Status and Perspectives |

### CFT Meeting

##### 538 Davey Lab and Zoom: https://psu.zoom.us/j/94790584999?pwd=RXJNa21jNmRxTFo0VHBWdlpCc3Nhdz09 (Password: 827251)

##### 2022-10-24

The CFT meets in 538 Davey Lab to go over member introductions and present updates on research.

14:00 | Jacob Bourjaily and Martin Bojowald | Introductions/Research Updates |

### PUG Seminar

##### 321 Whitmore

##### 2022-10-21

Kallan Berglund presents on quantum corrections in modified black holes and upcoming quasinormal mode predictions.

14:00 | Kallan Berglund | Quantum Corrections in Modified Black Holes and Upcoming Quasinormal Mode Predictions |

### Physics Colloquium

##### 101 Osmond

##### 2022-10-20

Adam Riess, Johns Hopkins Surprises from the Expansion of the Universe

15:45 | Adam Riess | Surprises from the Expansion of the Universe |

### Astronomy Colloquium

##### 538 Davey Lab

##### 2022-10-19

Sedona Price - Galaxy Structures Through Cosmic Time

15:45 | Sedona Price | Galaxy Structures Through Cosmic Time |

### Astronomy Lunch Talk

##### 538 Davey Lab

##### 2022-10-18

Arnab Dhani - Precision Cosmology in the XG Era

12:00 | 538 Davey Lab | Astronomy Lunch Talk |

### CMA Meeting

##### 538 Davey Lab

##### 2022-10-17

Miguel Mostafá presides over this month's CMA meeting. Attendees are invited to present an introduction and research update by submitting slides to: https://docs.google.com/presentation/d/1b4qiKOQA_E9C1qttdCTxKYblxmWCXTwcEGczjN5TY1Q/edit#slide=id.g1547379561b_0_53

14:00 | Miguel Mostafá | Introductions and Research Updates |

### PUG Seminar - Joshua Black

##### 321 Whitmore Lab

##### 2022-10-07

This week's Primordial Universe and Gravity Seminar, with speaker Joshua Black, on the derivation of the Chandrasekhar mass.

14:00 | Joshua Black | Derivation of the Chandresekhar mass. |

### Physics Colloquium: Jeff McMahon

##### 101 Osmond and zoom

##### 2022-10-06

Physics colloquium on progress in CMB observations.

15:45 | Jeff McMahon | CMB with ACT and CMB-S4 |

### International Loop Quantum Gravity Seminar - Eugenio Bianchi

##### 318

##### 2022-10-04

International Loop Quantum gravity Seminar with speaker Eugenio Bianchi, discussing causality in classical and quantum gravity.

10:00 | Eugenio Bianchi | Causality in Quantum and Classical Gravity |

### IGC-All Meeting

##### 538 Davey Lab

##### 2022-10-03

All-IGC meeting to discuss plans for the semester and initiatives for supporting research.

14:00 | Sarah Shandera | IGC-All meeting. |

### PUG (Primordial Universe and Gravity) Seminar

##### 321 Whitmore Lab

##### 2022-09-30

Unnati Akhouri presents

14:00 | Unnati Akhouri | PUG Seminar |

### Physics Colloquium

##### 101 Osmond

##### 2022-09-29

Tracy Slatyer of MIT presents on dark matter.

15:30 | Tracy Slatyer | Dark Matter |

### Astronomy Colloquium

##### 538 Davey Lab

##### 2022-09-28

Ashley Villar presents on building deep learning methodologies for time-domain astrophysics.

15:30 | Ashley Villar | Building Deep Learning Methodologies for Time-Domain Astrophysics |

### ILQGS (International Loop Quantum Gravity Seminar)

##### 318 Osmond

##### 2022-09-27

Alexander Jercher from LMU Munich presents on causality in spin foams.

10:00 | Alexander Jercher | Causality in Spin Foams |

### CFT Faculty Meeting

##### 538 Davey

##### 2022-09-26

The monthly faculty meeting for the Center for Fundamental Theory

14:00 | Martin Bojowald and Jacob Bourjaily | Faculty meeting for the Center for Fundamental Theory |

### CMA Faculty Meeting

##### 538 Davey

##### 2022-09-19

The Center for Multimessenger Astrophysics is hosting the next IGC meeting on Monday, Sept 19 at 2-3:00 PM in Davey 538. The meeting is dedicated to a broad discussion of the CMA's plans going forward for the Astrophysical Multimessenger Observatory Network (AMON). The meeting will be led by Stephanie Wissel and Hugo Ayala Solares. Attendees are welcome to submit a slide to showcase highlights from their research,including any IGC-CMA members that are involved using this link: https://docs.google.com/presentation/d/1b4qiKOQA_E9C1qttdCTxKYblxmWCXTwcEGczjN5TY1Q/edit?usp=sharing

14:00 | Stephanie Wissel and Hugo Solares | The monthly MMA Faculty Meeting |

### Simons Foundation Collaboration Meeting

##### 323 Whitmore

##### 2022-09-16

Meeting to discuss LOIs for this call: https://www.simonsfoundation.org/grant/simons-collaborations-in-mathematics-and-the-physical-sciences/?tab=how-to-apply

14:00 | Sarah Shandera | Simons Foundation Collaboration Meeting |

### CTOC Sept 12, 2022 meeting

##### 538 Davey Lab

##### 2022-09-12

Introductions and updates on Collaborations and research from CTOC members.

14:00 | Donghui Jeong | CTOC updates |

### IGC Welcome Back Meeting 2022

##### 538 Davey and on zoom

##### 2022-08-29

A chance to introduce new people and provide updates about the IGC community.

14:00 | Sarah Shandera | Welcome back remarks and introductions |

14:15 | All | Updates from IGC members |

14:55 | Chad Hanna | Update on web site and digital presence |

2014-05-01 - 2014-05-03

2011-10-01 - 2011-10-02

2010-07-01 - 2010-07-02