Speaker
Hidekazu Tsukiji
(Yukawa Institute for Theoretical Physics, Kyoto University)
Description
The problem of early thermalization is a theoretical challenge in relativistic heavy ion collisions. There are many proposals for pinning down the underlying mechanics for it. Immediately after a collision, which is a crucial stage of the problem, strong gluon field is dominant and quantum fluctuations on the top of the classical configurations (glasma) induce instabilities. It may trigger the chaotic behavior of the gauge field and eventually give rise to entropy production. In this work, we investigate thermalization of glasma by using the Husimi-Wehrl (H-W) entropy defined by Husimi function which is a coarse-grained quantum distribution function. We calculate the semi-classical time evolution of the Husimi function and the H-W entropy in Yang-Mills field theory with two numerical methods based on Monte-Carlo method, and also discuss the time scale of the entropy growth.
Author
Hidekazu Tsukiji
(Yukawa Institute for Theoretical Physics, Kyoto University)
Co-authors
Akira Ohnishi
(Yukawa Institute for Theoretical Physics, Kyoto University)
Hideaki iida
(Kyoto university)
Kunihiro Teiji
(Kyoto university)
Toru Takahashi
(Gunma National College of Technology)
