Real-time dynamics of Chern-Simons fluctuations near a critical point

Date

2021/02/26(Fri)14:00〜15:00

Venue

Online (Zoom)

Speaker

Dr. Kazuki Ikeda (Osaka University/ Kyocera)

Language

English

URL

Contact

skaika-AT-post.kek.jp


Overview

he real-time Chern-Simons diffusion rate is studied in (1 + 1)-dimensional massive Schwinger model with a θ-term. We evaluate the real-time correlation function of electric field that represents the topological Chern-Pontryagin number density in (1 + 1) dimensions. Near the parity-breaking critical point located at θ = π and fermion mass m to coupling g ratio of m/g ≈ 0.33, we observe a sharp maximum in the Chern-Simons diffusion rate. We interpret this maximum in terms of the growth of critical fluctuations near the critical point, and draw analogies between the massive Schwinger model, QCD near the critical point, and ferroelectrics near the Curie point.

Release date 2021/02/24 Updated 2024/08/07