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Past Seminar

Title              :

Disordered QFTs and Parisi-Sourlas supersymmetry

Speaker         : Apratim Kaviraj, DESY Hamburg
Date                : December 22, 2022
Time               : 3:30 PM
Venue            : Room 3307
Abstract        :

I will discuss the critical physics of a class of disordered
(impure) quantum field theories, called random field models. It was
conjectured by Parisi and Sourlas 40 years ago that these models have a
critical point characterized by an emergent supersymmetry and an
interesting 'dimensional reduction' property - that says they are related
to a lower dimensional pure critical point (i.e. an ordinary conformal
field theory). However, numerical simulations show that this conjecture
works only under some specific conditions, not otherwise. I will explain
these observations using the ideas of replica trick to set up a
textbook-like renormalization flow analysis of random field models.



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