New article on Inoreader

https://www.youtube.com/channel/UCj2PBh1npuzyQ52qqV9eAmQSlava Rychkov | Replicas and RG: case study of Random Field Ising Model -

Speaker: Slava Rychkov
Date: February 1, 2021
Title: Replicas and RG: case study of Random Field Ising Model
Abstract: Random Field Ising Model is the classical Ising model with added quenched disorder (magnetic impurities). This model has a second-order phase transition. For dimension D close to the upper critical dimension 6, the phase transition is described by a Parisi-Sourlas non-unitary supersymmetric CFT, and has the same critical exponents as the non-disordered Ising model in D-2 dimensions. For lower D supersymmetry and dimensional reduction are lost, but why? Elucidating this from the RG point of view was an open problem for many years. I will describe recent progress achieved in arXiv:1912.01617, arXiv:2009.10087 (joint work with Apratim Kaviraj and Emilio Trevisani).