Abstract: We study the *N *= 4 SYM stress tensor multiplet 4-point function for any value of the complexified coupling tau, and in principle any gauge group (we focus on SU(2) and SU(3) for simplicity).

# Events Archive

## High Energy Theory Seminar

### IAS HET Seminar | Shai Chester, Weizmann Institute of Science | "Bootstrapping N = 4 super-Yang-Mills on the conformal manifold" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom

### IAS HET Seminar | Ahsan Z Khan, Member, School of Natural Sciences, IAS | "TBA" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom

### 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.

### 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.

### 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.

### 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.

### IAS HET Seminar | Nathan Haouzi, Member, School of Natural Sciences, IAS | "Old and New Physics Prospects for q-Virasoro" | Wolfensohn Hall & on Zoom

This seminar will be presented **in-person in Wolfensohn Hall at the IAS and on Zoom.**

For contact-tracing purposes **all off-campus attendees must register for this seminar: **

REGISTRATION FORM

### HET Seminar | Alexei Kitaev, Caltech | “Topological Quantum Phases” | Bloomberg Lecture Hall

I will discuss topological classification of gapped many-body Hamiltonians and their ground states in dimension d. In general, the problem is too hard as it includes diverse phenomena such as degenerate ground states on the torus, anyons, and fractons.

### Physics Group Meeting | Sridip Pal, IAS | "Towards optimal asymptotic spectral gap in 2D unitary GFT" | Bloomberg Hall Physics Library

We will prove a conjecture [1] on upper bound of asymptotic gap in dimension in unitary compact 2D CFT, proving it to be 1 using a "extremal" function [2]. The notion of asymptotic gap can be generalized to (h, \bar{h}) plane [3].

### HET Seminar - Radu Roiban - Pennsylvania State University

### HET Seminar | Edgar Shaghoulian, Cornell | "Integrable deformations in quantum mechanics, T-Tbar, and SYK" | Jadwin A06

The Wilsonian paradigm suggests universality of quantum field theory in the infrared. Interestingly, it also suggests universality of quantum mechanics (d=1 quantum field theory) in the ultraviolet. This suggests a study of the landscape of the infrared and the robustness of the ultraviolet.

### HET Seminar | Theo Johnson-Freyd, Perimeter Institute | “TMF and SQFT” | Bloomberg Lecture Hall

I will describe my work, all joint with D. Gaiotto and some also joint with E. Witten, to understand the homotopy type of the space of (1+1)d N=(0,1) SQFTs --- what a condensed matter theorist would call "phases" of SQFTs. Our motivating hypothesis (due in large part to Stolz and Teichner) is that this space models the spectrum called "...

### High Energy Theory | Joao Penedones, EPFL | "S-matrix Bootstrap for Effective Field Theories"

I will explain how the S-matrix Bootstrap for massless particles can be used to constrain the space of Effective Field Theories (EFT). In particular, I will discuss the S-matrix bootstrap for massless particles in unitary, relativistic two dimensional quantum field theories.

### Physics Group Meeting | "Title to be announced." | Bloomberg Hall Physics Library

### HET Seminar | Callum Jones, U of Michigan | "Born-Infeld Electrodynamics at One-Loop” | Jadwin A06

The Born-Infeld model is an effective field theory of central importance describing the low-energy dynamics of massless gauge bosons on the world-volume of D-branes. Though it is in many ways an exceptional model of nonlinear electrodynamics, several aspects of the physics of the Born-Infeld model remain mysterious.

### High Energy Theory | Jacobus Verbaarschot, Stony Brook | "Chaotic and Thermodynamic Properties of two Coupled Sachdev-Ye-Kitaev Models" | PCTS Seminar Room 407

The SYK Model was originally introduced as a random matrix model for the nuclear interaction that also describes the exponential rise of the spectral density known as the Bethe formula.

### Physics Group Meeting | Nafiz Ishtiaque, IAS | “Topological Holography” | Bloomberg Hall Physics Library

We consider supersymmetric twist and omega deformation of a type IIB brane setup involving N D3 and K D5 branes. In the large N limit, this leads to a holographic duality between two topological/holomorphic theories. We compute certain operator algebras from both sides of this topological holographic duality and find the result consistent with...

### HET Seminar | Tom Hartman, Cornell University | "Dynamical Constraints on RG Flows and Cosmology” | Bloomberg Lecture Hall

I will discuss time-dependent probes of the renormalization group, and derive new constraints that govern the spread of local operators in holographic theories. The same methods lead to sum rules for inflationary correlators, relating observables, like the speed of sound during inflation, to properties of the UV theory.

### Physics Group Meeting at IAS | Robert Penna, IAS | “The Geroch Group” | Bloomberg Hall Physics Library

We review some infinite dimensional symmetries that appear indimensionally reduced classical general relativity.

### Physics Group Meeting at IAS | Robert Penna, IAS | “The Geroch Group” | Bloomberg Hall Physics Library

We review some infinite dimensional symmetries that appear indimensionally reduced classical general relativity.