Positive magnetoresistance induced by hydrodynamic fluctuations in chiral media

June 10, 2021
10:00am to 11:00am

IFT Zoom webinar

Specialist level
Speaker: 
Noriyuki Sogabe
Institution: 
Institute of Modern Physics, Lanzhou, China
Location&Place: 

IFT Zoom webinar

Abstract: 

We analyze the combined effects of hydrodynamic fluctuations and chiral magnetic effect (CME) for a chiral medium in the presence of a background magnetic field. Based on the recently developed non-equilibrium effective field theory, we show fluctuations give rise to a CME-related positive contribution to magnetoresistance, while the early studies without accounting for the fluctuations find a CME-related negative magnetoresistance. At zero axial relaxation rate, the fluctuations contribute to the transverse conductivity in addition to the longitudinal one.