Events Archive

PGI Fall Seminar Series|Ruben Monten|U.C.L.A.|"TTbar Deformed Boundary Gravitons"
Mon, Sep 26, 2022, 12:30 pm1:30 pm

Pure 3d gravity in AdS has only boundary degrees of freedom. I will show that these interact nontrivially if spacetime is restricted to a finite size. Their dynamics can be obtained equivalently by TTbar deforming the infinite volume theory. We can canonically quantize the gravitational side and, after a field redefinition, find a simple…

Biophysics Seminar: Stephen Floor, UCSF| On measurement in RNA biology
Mon, Sep 26, 2022, 12:30 pm1:30 pm

Measurement of natural systems typically involves perturbation and interpretation. In this talk, I will discuss the implications of measurement in the context of RNA in gene expression in human cells. I will focus on measurements of RNA biology using high-throughput sequencing, which are powerful for their scale but also involve perturbations…

A free lecture open to the public.
HET Seminar | Ashoke Sen, International Centre for Theoretical Sciences - TIFR | “Semi-inclusive cross section in two dimensional type 0B string theory” | Via Zoom
Mon, Sep 26, 2022, 9:30 am9:30 am

D-instanton induced S-matrix in type 0B string theory in two dimensions suffers from infrared divergences. This can be traced to the fact that these processes produce low energy rolling tachyon states that cannot be regarded as linear combination of finite number of closed string states. We compute semi-inclusive cross sections in this theory…

Dark Cosmos Seminar: Saptarshi Chaudhuri
Tue, Sep 20, 2022, 4:00 pm5:30 pm

QCD axions and Dark Matter Radio

The QCD axion, originally posed a solution to the strong CP problem, is among the most compelling candidates in the hunt for dark matter. The last decade has seen the emergence of several new ideas to search for axion dark matter. In this talk, I overview the landscape of…

HET Seminar | Avia Raviv-Moshe, SCGP | “Line Defects in CFTs: from Spin Impurities to Wilson Lines” | PCTS & Zoom
Mon, Sep 19, 2022, 2:30 pm2:30 pm

In this talk, we will consider line defects (one-dimensional defects) in CFTs. Such systems are of relevance to various physical systems, with applications ranging from condensed matter physics to conformal gauge theories. I will review some general properties of line defects in CFTs, especially in the context of RG flows on line defects, where…

Biophysics Seminar: Shenshen Wang, UCLA| Limit and potential of immune learning against changing targets
Mon, Sep 19, 2022, 12:30 pm1:30 pm
Free and open to the public
PGI Seminar Series Fall 2022|Sam Leutheusser|Princeton University|"Emergent Times in Holographic Duality"
Mon, Sep 19, 2022, 12:30 pm1:30 pm

Abstract: In holographic duality an eternal AdS black hole is described by two copies of the boundary CFT in the thermal field double state. We provide explicit constructions in the boundary theory of infalling time evolutions which can take bulk observers behind the horizon. The constructions…

IAS HET Seminar | Sahand Seifnashri, IAS| “"Non-Invertible Symmetries and their Representations"” | Bloomberg Lecture Hall & Zoom
Fri, Sep 16, 2022, 1:45 pm3:00 pm

 In the first half of the talk, I will review the notion of non-invertible symmetries and how they help us to analyze certain strongly coupled QFTs like 2d Adjoint QCD. Then, I discuss the representation theory of non-invertible symmetries and use it to derive selection rules on correlation functions of local operators. Using this…

Rising Stars
Thu, Sep 15, 2022
Rising Stars
Wed, Sep 14, 2022
Rising Stars
Tue, Sep 13, 2022
PGI Seminar Series Fall 2022|Fabio Antonini|Cardiff University|"Astrophysical Implications of Gravitational Wave Detections"
Mon, Sep 12, 2022, 12:30 pm1:30 pm

Recently, the LIGO, Virgo and KAGRA scientific collaboration reported the detection of nearly 80 gravitational wave sources, with the majority of them being binary black holes. The increased number of binary black hole observations allow for a more detailed investigation of their mass, spin and redshift distributions. I will discuss these…

Simons Confinement Collaboration Inaugural Workshop
Thu, Sep 8, 2022Sat, Sep 10, 2022

Organizer: Igor Klebanov

The Simons Foundation is pleased to announce the establishment of the Simons Collaboration on Confinement and QCD Strings

, directed by…

HET Seminar | Himanshu Raj, IPhT, Saclay | “Integrated correlators in N = 4 SYM via SL(2, Z) spectral theory” | PCTS & Zoom
Mon, Aug 15, 2022, 2:30 pm2:30 pm
Using supersymmetric localization and SL(2,Z) spectral theory we obtain exact results for a large class of integrated four-point functions of 1/2-BPS operators in N=4 SYM with gauge group SU(n). The integrated correlators we consider involve correlation functions of higher weight operators that are computable using the N=2*…
HET Seminar | Cobi Sonnenschein, Tel Aviv University & NYU | “A simple holographic model of a domain wall between confining and de-confining phases, and its velocity” | PCTS & Zoom
Mon, Aug 8, 2022, 2:30 pm2:30 pm

In the context of theories with a first order phase transition, we propose a general covariant description of coexisting phases separated by domain walls using an additional order parameter-like degree of freedom. In the case of a holographic dual of confining and de-confining phases, the resulting model extends hydrodynamics and…

HEP Seminar-Qianshu Lu-Harvard-"Physics at a High Energy Muon Collider"
Mon, Jul 11, 2022, 2:00 pm2:00 pm

 A high energy muon collider is a unique machine that breaks the traditional energy/precision dichotomy. It provides both an unprecedented reach in energy with a compact ring and a clean environment that allows precise measurements. I will provide an overview of the powerful physics potential of a multi-TeV muon collider, starting from its…

University Closed
Fri, Jun 17, 2022, 8:06 am8:06 am
HEP Seminar-Caterina Vernieri- Stanford- A "Cool" Route to Unveil the Higgs Boson’s Secrets
Thu, Jun 16, 2022, 2:00 pm2:00 pm

The Higgs boson was discovered in 2012 by the ATLAS and CMS experiments at the world’s most powerful particle collider, the Large Hadron Collider (LHC) in Geneva, Switzerland. This particle plays a unique role in fundamental physics. It gives all of the known elementary particles, including itself, their masses. While we now have a strong…

Counting holes in a Fermi sea by multipartite entanglement
Mon, Jun 6, 2022, 2:00 pm2:00 pm

Topologists can differentiate between bagels and pretzels by simply counting holes in each bread. The number of holes, formally described by the Euler characteristic, is a topological invariant insensitive to smooth deformation of the shape and size of an object. In condensed matter physics, we study an analogue of pastry, the Fermi sea. Nature…

“Getting a Big Bang out of Physics” - Prof. Chris Tully
Fri, May 20, 2022, 4:00 pm4:00 pm

Please join for this special reunion event which will prove to be memorable!