Speaker: Masato Itami [ 伊丹將人氏 (京都大学福井謙一記念研究センター)]

Date：Sep. 24th 16:00 -

Place：物理学科会議室

Title：Stochastic order parameter dynamics for phase coexistence in heat conduction

Abstract：

What is the liquid-gas interface temperature of pure water under steady heat conduction? One may naively answer that it should be 100 degree Celsius at 1 atm. For this question, Nakagawa and Sasa predict that the interface temperature deviates from the equilibrium transition temperature by using the framework of ``global thermodynamics'' they constructed [1]. To study this phenomenon from a microscopic viewpoint, we develop a theory of stochastic order parameter dynamics for phase coexistence in heat conduction [2].

In this seminar, I focus on Sec. IIIC in [2]. First, I briefly show the outline of [2]. Next, I carefully review fluctuating hydrodynamics, including the universal form of equilibrium stochastic evolution and ``Ito-Stratonovich dilemma'' in fluctuating hydrodynamics. Finally, I explain the construction method of the stochastic order parameter dynamics in [2] with emphasis on the role of scale separations.

[1] N. Nakagawa and S. Sasa, Phys. Rev. Lett. 119, 260602 (2017); arXiv:1906.07022.

[2] S. Sasa, N. Nakagawa, M. Itami, and Y. Nakayama, arXiv:1908.03029.