Indico search will be reestablished in the next version upgrade of the software: https://getindico.io/roadmap/

#### This search is only for public events. Restricted events are not available.

IMPORTANT! Indico has been upgraded. Please let us know as soon as possible if you find any issues and email indico-support@fnal.gov

# 36th Annual International Symposium on Lattice Field Theory

22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

## U(1) vacuum, Chern-Simons diffusion and real-time simulations

Jul 23, 2018, 3:00 PM
20m
105 (Kellogg Hotel and Conference Center)

### 105

#### Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Applications Beyond QCD

### Speaker

Non-abelian gauge theories have a complex vacuum structure which has well-known dynamical consequences. The prototypical example is given by $SU(2)$ sphalerons and their potential role in baryogenesis. Transitions between topologically inequivalent vacua can produce some irreversible net amount of chiral charge. At a first glance, it does not seem that similar effects may be obtained with Abelian fields as they have a topologically non-degenerate vacuum. Looking more closely, one may realise that the addition of a background magnetic field changes the picture. The aim of this talk is to present an investigation of such systems based on real-time simulations. In particular, we will give some context by presenting the numerical set up, before discussing results on the U(1) Chern-Simons diffusion rate in a constant magnetic background. We will also discuss the evolution of the chiral chemical potential.