主讲人：Giulio Casati（英苏布里亚大学）

题目：Onsager relations, nonequilibrium phase transitions and absolute negative mobility

时间：2021年11月11日下午16：00

会议ID：（ZOOM）487 898 2183

直播链接：https://www.koushare.com/lives/room/329276

报告摘要：

The understanding of the underlying dynamical mechanisms which determines the macroscopic laws of heat conduction is a long standing task of non-equilibrium statistical mechanics. A better understanding of such mechanism may also lead to potentially interesting applications based on the possibility to control the heat flow, and to new theoretical results. In particular we discuss the possibility of absolute negative mobility (ANM) which is a highly counterintuitive phenomenon, where the sign of the induced current is opposite to the applied forces.

We also provide analytical and numerical evidence that Onsager reciprocal relations remain valid for systems with broken time-reversal symmetry as is typically the case when a generic magnetic field is present. Hence, the fundamental constraints that Onsager relations impose on heat to work conversion remain valid also with broken time-reversal symmetry. In particular, the possibility of an engine operating at the Carnot efficiency with finite power is ruled out on purely thermodynamic grounds.

Reference

[1] G. Benenti, G. Casati, K. Saito, and R. S. Whitney, Phys. Rep. 694 (2017) 1.

[2] J. Wang and G. Casati, Phys. Rev. Lett. 118 (2017) 040601.

[3] Rongxiang Luo, G. Benenti, G. Casati, and Jiao Wang, Phys. Rev. X 2, 022009(R) (2020)

[4] Jiao Wang, G. Casati, and G. Benenti Phys. Rev. Lett. 124 (2020) 110607.

个人简介：

Giulio Casati，意大利科莫湖高级研究学院院长，纳塔尔国际物理研究所特聘访问教授。长期致力于经典和量子混沌，非线性动力学和复杂系统，统计物理，理论物理研究。发现了量子动力学中的局域化现象，量子力学中混沌的相关性，单色场中氢原子混沌激发的量子限制等。

Awards：

Italian Prize for Physics “F. Somaini” （1991）

Enrico Fermi Prize（2008）

International prize for Physics  2010- Accademia Nazionale dei Lincei（2010）