Physics

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IAS Quantum Aspects of Black Holes Group Meeting

March 05, 2026 | 11:00am - 12:00pm
Add to calendar 03/05/2026 11:00 03/05/2026 12:00 IAS Quantum Aspects of Black Holes Group Meeting use-title Topic: TBA Speakers: Gautam Satishchandran, Princeton University More: https://www.ias.edu/sns/events/ias-quantum-aspects-black-holes-group-meeting-62 Bloomberg Hall Physics Library & Zoom a7a99c3d46944b65a08073518d638c23
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IAS Amplitudes Group Meeting

March 03, 2026 | 2:30pm - 4:00pm
Add to calendar 03/03/2026 14:30 03/03/2026 16:00 IAS Amplitudes Group Meeting use-title Topic: Informal Discussion More: https://www.ias.edu/sns/events/ias-amplitudes-group-meeting-83 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
March 10, 2026 | 2:30pm - 4:00pm
Add to calendar 03/10/2026 14:30 03/10/2026 16:00 IAS Amplitudes Group Meeting use-title Topic: Informal Discussion More: https://www.ias.edu/sns/events/ias-amplitudes-group-meeting-83 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
March 17, 2026 | 2:30pm - 4:00pm
Add to calendar 03/17/2026 14:30 03/17/2026 16:00 IAS Amplitudes Group Meeting use-title Topic: Informal Discussion More: https://www.ias.edu/sns/events/ias-amplitudes-group-meeting-83 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
March 24, 2026 | 2:30pm - 4:00pm
Add to calendar 03/24/2026 14:30 03/24/2026 16:00 IAS Amplitudes Group Meeting use-title Topic: Informal Discussion More: https://www.ias.edu/sns/events/ias-amplitudes-group-meeting-83 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
March 31, 2026 | 2:30pm - 4:00pm
Add to calendar 03/31/2026 14:30 03/31/2026 16:00 IAS Amplitudes Group Meeting use-title Topic: Informal Discussion More: https://www.ias.edu/sns/events/ias-amplitudes-group-meeting-83 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
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Princeton University Gravity Initiative Seminar

March 02, 2026 | 12:30pm - 1:30pm
Add to calendar 03/02/2026 12:30 03/02/2026 13:30 Princeton University Gravity Initiative Seminar use-title Topic: Probing Dense Matter Physics with Multimessenger Observations of Neutron Stars: Equation of State and Pressure Anisotropy Speakers: Kent Yagi, University of Virginia More: https://www.ias.edu/sns/events/princeton-university-gravity-initiative-seminar-15 ABSTRACT: The extreme-density environments inside neutron stars provide a unique natural testbed for probing nuclear physics. In the first part of this talk, I will explain how gamma-ray burst observations can be used to extract information about post-merger remnants of binary neutron star mergers, and how multimessenger observations of neutron stars can constrain the nuclear matter equation of state. In the second part, I will focus on probing pressure anisotropy inside neutron stars, motivated by various physical mechanisms including elasticity and magnetic fields. Adopting a phenomenological anisotropy model, we find that, unlike the isotropic-pressure case, anisotropic neutron stars can be unstable to non-radial pulsations. Using a quasi-universal relation between the tidal deformability and the fundamental oscillation frequency, we derive equation-of-state–independent constraints on the degree of pressure anisotropy from gravitational-wave observations. Jadwin Hall, Princeton Gravity Initiative, 4th Floor a7a99c3d46944b65a08073518d638c23

Abstract: The extreme-density environments inside neutron stars provide a unique natural testbed for probing nuclear physics. In the first part of this talk, I will explain how gamma-ray burst observations can be used to extract information about...

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IAS Quantum Aspects of Black Holes Group Meeting

February 26, 2026 | 11:00am - 12:00pm
Add to calendar 02/26/2026 11:00 02/26/2026 12:00 IAS Quantum Aspects of Black Holes Group Meeting use-title Topic: TBA Speakers: Herman Verlinde, Princeton University More: https://www.ias.edu/sns/events/ias-quantum-aspects-black-holes-group-meeting-63 Bloomberg Hall Physics Library & Zoom a7a99c3d46944b65a08073518d638c23
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Princeton University Dark Cosmos Seminar

February 24, 2026 | 4:00pm - 5:30pm
Add to calendar 02/24/2026 16:00 02/24/2026 17:30 Princeton University Dark Cosmos Seminar use-title Topic: Simulating self-interacting dark matter with AREPO-2 Speakers: Oliver Zier, Center for Astrophysics | Harvard & Smithsonian More: https://www.ias.edu/sns/events/princeton-university-dark-cosmos-seminar-45 ABSTRACT: Self-interacting dark matter (SIDM) is a well-motivated extension of ΛCDM that can alter the inner structure of haloes via collisional heat transport. It has been explored as a possible solution to small-scale tensions such as the cusp--core problem. SIDM can also produce dense dark substructures through gravothermal core collapse, potentially observable via perturbations to cold stellar streams or through strong gravitational lensing. In this talk, I present a new Monte-Carlo-based SIDM module for the moving-mesh code AREPO-2. The implementation uses (i) a dedicated neighbour-search tree for dark-matter particles and (ii) a new hypercube-based communication scheme that naturally supports multiple scattering events per particle within a single timestep. Together, these improvements yield a substantial speed-up compared to legacy SIDM implementations and bring the runtime close to that of pure CDM simulations. Finally, the module is designed to be easily extended to arbitrary two-body dark-matter interactions, without requiring detailed knowledge of the underlying parallelisation scheme, enabled by a simplified programming interface. Jadwin Hall, Joe Henry Room a7a99c3d46944b65a08073518d638c23

Abstract: Self-interacting dark matter (SIDM) is a well-motivated extension of ΛCDM that can alter the inner structure of haloes via collisional heat transport. It has been explored as a possible solution to small-scale tensions such as the cusp-...

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IAS Physics+Astro Meeting

February 24, 2026 | 2:30pm - 4:00pm
Add to calendar 02/24/2026 14:30 02/24/2026 16:00 IAS Physics+Astro Meeting use-title Topic: A Theory for Collisionless Relaxation: Origin of the NFW Profile in Cold Dark Matter Halos Speakers: Uddipan Banik, Institute for Advanced Study More: https://www.ias.edu/sns/events/ias-physicsastro-meeting-2 Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23
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IAS High Energy Theory Seminar

February 23, 2026 | 2:30pm - 3:30pm
Add to calendar 02/23/2026 14:30 02/23/2026 15:30 IAS High Energy Theory Seminar use-title Topic: A Hologram of Super Yang-Mills at Weak Coupling Speakers: Atul Sharma, Harvard University More: https://www.ias.edu/sns/events/ias-high-energy-theory-seminar-108 ABSTRACT: I will employ twistor string theory to construct a bulk dual of _N _= 4 super Yang-Mills in the regime of _weak_ 't Hooft coupling. I will also discuss applications of this duality to the study of scattering amplitudes, giant graviton correlators, and related observables. Bloomberg Lecture Hall (IAS) & Zoom a7a99c3d46944b65a08073518d638c23

Abstract: I will employ twistor string theory to construct a bulk dual of N = 4 super Yang-Mills in the regime of weak 't Hooft coupling. I will also discuss applications of this duality to the study of scattering amplitudes, giant graviton...

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Princeton University Gravity Initiative Seminar

February 23, 2026 | 12:30pm - 1:30pm
Add to calendar 02/23/2026 12:30 02/23/2026 13:30 Princeton University Gravity Initiative Seminar use-title Topic: Black Hole Non-linear Stability: A Mathematical Overview Speakers: Elena Giorgi, Columbia University More: https://www.ias.edu/sns/events/princeton-university-gravity-initiative-seminar-14 ABSTRACT: In this talk, I will survey key geometric and analytic aspects of black hole perturbations, focusing on recent advances in understanding their dynamical stability, with a particular emphasis on the recent proof of the full nonlinear stability of the slowly rotating Kerr family as solutions to the vacuum Einstein equations. Jadwin Hall, Princeton Gravity Initiative, 4th Floor a7a99c3d46944b65a08073518d638c23

Abstract: In this talk, I will survey key geometric and analytic aspects of black hole perturbations, focusing on recent advances in understanding their dynamical stability, with a particular emphasis on the recent proof of the full nonlinear...

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IAS CMP/QFT Group Meeting

February 23, 2026 | 11:00am - 12:00pm
Add to calendar 02/23/2026 11:00 02/23/2026 12:00 IAS CMP/QFT Group Meeting use-title Topic: Entropic Order Speakers: Fedor Popov, SCGP, Stony Brook University More: https://www.ias.edu/sns/events/ias-cmpqft-group-meeting-28 ABSTRACT: Ordered phases of matter, such as solids, ferromagnets, superfluids, or quantum topological order, typically only exist at low temperatures. Despite this conventional wisdom, we present explicit local models in which all such phases persist to arbitrarily high temperature. This is possible since order in one degree of freedom can enable other degrees of freedom to strongly fluctuate, leading to "entropic order", whereby typical high energy states are ordered. Our construction, which utilizes interacting bosons, avoids existing no-go theorems on long-range order or entanglement at high temperature. We propose a simple model for high-temperature superconductivity using these general principles. Bloomberg Lecture Hall (IAS) a7a99c3d46944b65a08073518d638c23

Abstract: Ordered phases of matter, such as solids, ferromagnets, superfluids, or quantum topological order, typically only exist at low temperatures. Despite this conventional wisdom, we present explicit local models in which all such phases...

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Princeton University High Energy Theory Seminar

February 20, 2026 | 11:00am - 12:15pm
Add to calendar 02/20/2026 11:00 02/20/2026 12:15 Princeton University High Energy Theory Seminar use-title Topic: The Matrix Bootstrap Speakers: Henry Lin, Princeton University More: https://www.ias.edu/sns/events/princeton-university-high-energy-theory-seminar-42 ABSTRACT: I will survey recent developments in the matrix bootstrap, a non-perturbative method for solving large N quantum systems, including applications to the c=1 string and BFSS. I will also discuss work in progress with Klebanov and Meshcheriakov on the existence of a Regge trajectory in the adjoint sector of the 1-matrix quantum mechanics. Jadwin Hall, PCTS Room 407 a7a99c3d46944b65a08073518d638c23

Abstract: I will survey recent developments in the matrix bootstrap, a non-perturbative method for solving large N quantum systems, including applications to the c=1 string and BFSS. I will also discuss work in progress with Klebanov and...