第4期 全海涛: Path Integral Approach to Quantum Thermodynamics(7月15日15:00-16:00)

第4期  全海涛:Path Integral Approach to Quantum Thermodynamics

2020年7月15日(周三)15:00-16:00
报告人:全海涛 北京大学 

摘要:Work belongs to the most basic notions in thermodynamics but it is not well understood in quantum systems, especially in open quantum systems. By introducing a novel concept of work functional along individual Feynman path, we invent a new approach to study thermodynamics in the quantum regime. Using the work functional, we derive a path-integral expression for the work statistics. By performing the expansion, we analytically prove the quantum-classical correspondence of the work statistics. In addition, we obtain the quantum correction to the classical fluctuating work. We can also apply this approach to an open quantum system in the strong coupling regime described by the quantum Brownian motion model.This approach provides an effective way to calculate the work in open quantum systems by utilizing various path integral techniques. As an example, we calculate the work statistics for a dragged harmonic oscillator in both isolated and open quantum systems.

报告人简介
全海涛,北京大学博雅特聘教授。2002年在中南大学获得学士学位,2007年在中国科学院理论物理研究所获得博士学位。2007年9月—2012年12月分别在美国能源部洛斯阿拉莫斯国家实验室和美国马里兰大学从事博士后研究。2012年12月加盟北京大学物理学院,2018年12月获得长聘职位,同时晋升教授。主要研究领域是统计物理和量子物理的基本问题。迄今为止共发表40多篇论文,总共获得3200多次引用(来自Google scholar)。先后获得过的奖励和荣誉包括:国家自然科学奖二等奖(第二完成人)(2008年),全国百篇优秀博士学位论文奖(2009年),国家杰出青年科学基金(2018年)。

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