Events Daily

Wednesday, November 10, 2021

Distinguishing formation mechanisms of dwarf galaxies using their intrinsic shapes
Erin Kado-Fong, Princeton University
Event Type: Informal Astro Talk
Time: 11:00 AM - 12:00 PM
Location: 726 Broadway, 940, CCPP Seminar

Link to the Event Video

2D black hole sigma models from an integrable spin chain
Sergei Lukyanov, Rutgers
Event Type: HEP Seminar
Time: 2:00 PM - 3:00 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: The class of Non-Linear Sigma Models NLSM in two space-time dimensions 
have many interesting physical applications.
 Within the path integral formulation, 
we are 
forced to focus on the NLSM whose target space has Euclidean signature.
 However among the 
most prominent applications of the models are the description of the universality classes in disordered systems, where the requirement of Euclidean signature for the target space 
which is closely related to unitarity may be too severe. When faced with the study of a NLSM whose metric is of Lorentzian signature, 
the first thing that may come to mind is to apply the Wick rotation to the target manifold similar to 
the famous trick for the world-sheet. However, how would the results on 
 the Euclidean NLSM help in understanding its Lorentzian counterpart beyond the
 scope of the classical field theory? Generally speaking, no reliable resolution is currently available.
 In the talk some recent progress for 
the so-called Euclidean/Lorentzian black hole NLSMs will be described
 these models can be obtained by gauging the 
SL2,R WZW model over the compact/non-compact one dimensional subgroup.
 The results were obtained using a surprising relation between the sigma models and a certain integrable spin chain.

Link to the Event Video

Event Type: Astroparticle Group Meet
Time: 2:00 PM - 5:30 PM
Location: 726 Broadway, 901, Sm Conf