Dec 15 – 18, 2020
Online (Zoom)
Asia/Tokyo timezone

Complex Langevin analysis of four-dimensional SU(2) gauge theory with a theta term

Dec 16, 2020, 5:00 PM
Online (Zoom)

Online (Zoom)

The necessary information (links, IDs and passwords) will be sent to the participants by E-mail before the workshop starts.


Mr Atis Yosprakob (SOKENDAI)


Gauge theory with a theta term has recently been of great interest, especially at $\theta=\pi$, where nontrivial phase structure is expected from the 't Hooft anomaly matching condition. However, it is difficult to study the theory numerically due to the severe sign problem. We try to overcome this by using the complex Langevin method. In our previous work, we apply the technique to the 2d U(1) gauge theory. We were able to reproduce the exact result by introducing a puncture on the torus. We also show that the effect of the puncture disappears in the infinite volume limit in the region $|\theta|<\pi$. In this study, we attempt to apply the method in the 4d SU(2) gauge theory and present some preliminary results.

Presentation materials

There are no materials yet.