# Events Archive

## 2021

### Pseudo-Gauge Field in Dirac/Weyl Materials/ Chaoxing Liu/ Pennsylvania State University

### HET Seminar | Minjae Cho | "A few applications of String Field Theory" | PCTS 407 & Zoom

String field theory is usually considered to be a difficult and complicated object to understand and study. However, due to its field-theoretic nature, it provides a useful framework to address physical questions which are in particular natural from field theory perspective.

### To Be Re-scheduled-Biophysics Seminar: Danielle Bassett, University of Pennsylvania|TBD

### PGI Fall Seminar Series| Georgios Moschidis| Princeton University|"The Instability of Anti-de Sitter Spacetime for the Einstein-scalar Field System"

### Princeton Quantum Colloquium: "Many-body physics in the NISQ era": Professor Vedika Khemani (Stanford)

Abstract

### HET Seminar | Victor Rodriguez | Postdoctoral Research Associate FFPF Fellow | "Perturbative and Non-Perturbative Aspects of 2D Type 0B String Theory" | PCTS (Room 407) & Zoom

Abstract:

### Hamilton Colloquium Series, Eliot Quataert, Princeton University, “Neutron Star Mergers, Gravitational Waves and the Origin of the Elements”

The discovery of compact object mergers by LIGO has opened up a new window into the Universe’s most exotic objects, neutron stars and black holes. Maximizing the scientific return of this new window requires connecting gravitational wave detections to the wealth of electromagnetic data on similar...

### Mathematical Physics Seminar, Tues, Nov 2, 4:30pm, Jadwin A06, Jacob Shapiro, Princeton University, “Depinning in the integer-valued Gaussian field and the BKT phase of the 2D Villain model”

It is shown that the Villain model of two-component spins over two dimensional lattices exhibits slow, non-summable, decay of correlations at any temperature at which the dual integer-valued Gaussian field exhibits depinning.

### The Universe from a single Particle - Michael Freedman - Microsoft Q

I will explore a toy model for our universe in which spontaneous symmetry breaking – acting on the level of operators (not states) - can produce the interacting physics we see about us from the simpler, single particle, quantum mechanics we study as undergraduates.

### HET Seminar | | Henriette Elvang, University of Michigan | "Bootstrap of the KLT Double-Copy" | via Zoom

In field theory, the "double copy" can be thought of as a multiplicative map between tree amplitudes of two field theories into tree amplitudes of another theory. This map has an identity element that is closely linked to the multiplication kernel that defines the KLT formulation of the double-copy.

### PGI Fall Seminar Series| Keefe Mitman|Caltech| "Gravitational Waves in Numerical Relativity and the Importance of BMS Frames"

Abstract:

### Biophysics Seminar: Alison Sweeney, Yale University| The Physical Design of Optimum Solar Resource Utilization in Giant Clams

Photosynthesis presents a paradox of solar energy: the maximum quantum efficiency of photosystem II likely surpasses that of any engineered system, but in environments with high solar flux, photosynthetic organisms are famously wasteful and resource inefficient.

### Princeton Quantum Colloquium: "Benchmarking Analog Quantum Simulators based on Emergent Randomness," Soonwon Choi (MIT)

Abstract: Recent advances in experiments allowed us to simulate a variety of interesting quantum many-body phenomena from thermalization and localization to universal scaling across phase transitions.

### FPO- Brian Trundy, "“Real and p-adic Physics”

**Abstract: **This thesis examines the consequences of non-Archimedean geometry in holography and many-body physics. In this framework real space is replaced by a non-Archimedean field which is almost always a padic field or an algebraic extension of a p-adic field. The corresponding bulk geometry is replaced by a discrete tree.

### IAS HET Seminar | Venkatesa Chandrasekaran, Member, School of Natural Sciences, IAS | "The Area Operator in Gravity and Holography" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom

Abstract: The area operator plays a central role in our understanding of holography and black hole thermodynamics. In this talk I will discuss a formulation of the area operator at the level of classical gravity, the “kink transform”, which defines a notion of a half-sided boost of gravitational initial data.

### PRISM/PCCM SEMINAR: Elastohydrodynamic Friction: From Colloidal Networks to Haptic Materials

Abstract: The need to understand friction fundamentally at the microscale is increasingly important in technologies as diverse as soft robotics and consumer products. The first part of the talk focuses on the role of particle roughness in the rheology, structure, and dynamics of dense colloidal suspensions.

### Mathematical Physics Seminar, Tues, Oct 26, 4:30pm, Jadwin A06, Terry Loring, University of New Mexico, “EMERGENT TOPOLOGY FROM FINITE VOLUME TOPOLOGICAL INSULATORS”

Finite volume (or area) models for topological insulators are closer to experiment than in_nite volume models. However, they are only indirectly connected to Brillouin zone and so we need to look elsewhere for a topological space.

### Special IAS HET Seminar | Nima Arkani-Hamed, Professor, School of Natural Sciences, IAS | "Spacetime and Quantum Mechanics; Particles and "Strings"; Polytopes, Binary Geometries and Quiver Categories" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom

**Abstract:** The past decade has seen the emergence of surprising new connections between the real-world physics of elementary particle scattering processes, and simple new mathematical structures in combinatorics, algebra and geometry.

### CM/AMO Seminar/Spin dynamics of ultracold atoms in optical lattices/Wolfgang Ketterle, MIT

Ultracold atoms offer a unique platform to perform quantum simulations of quantum materials and many-body systems. When atoms with spin are arranged in an optical lattice in form of a Mott insulator, they realize paradigmatic Heisenberg spin models, where only neighboring spins interact. Until very recently, all experimental studies with cold...

### IAS HET Seminar | Michael Levin, University of Chicago | "Lattice Edge Theories for Topological Phases of Matter" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom

**Abstract:** Edge excitations of (2+1)D topological phases are usually described using continuum field theories. But the boundaries of some (2+1)D topological phases can also be described using lattice-like edge theories that have a finite dimensional Hilbert space for a finite size boundary.