**【报告题目】****Quantum thermodynamics in the strong coupling regimes**

**【报告人】****窦文杰 教授, 西湖大学**

**【时间】**2021.11.10 **(周三) 上午10:00**

**【云报告地点】**会议ID： 955 417 462

**【报告摘要】**A system interacting with its surroundings exchanges energy in various forms, such as through the flow of heat or particles. These transport processes contain valuable information about both the system and surroundings. At the quantum scale, describing such non-equilibrium processes is relevant to understanding, for example, how charges flow through a semiconductor quantum dot or through a molecular junction. But how do quantum phenomena govern energy transport processes, and how can the resulting effects be harnessed to develop novel quantum technologies? Answering these questions theoretically is a very difficult task, particularly for a system that is strongly coupled to its surroundings. We present an approach based on a density matrix expansion to study thermodynamic properties of a quantum system strongly coupled to two or more baths. For slow external driving of the system, we identify the adiabatic and nonadiabatic contributions to thermodynamic quantities, and we show how the first and second laws of thermodynamics are manifested in the strong coupling regime. Particularly, we show that the entropy production is positive up to second order in the driving speed. When electron-electron interactions are included, we see exotic Kondo resonances as well as Coulomb blackade appearing in thermodynamic quantities.

**【报告人简介】**Wenjie Dou earned a B.S. in physics from University of Science and Technology of China in 2013 and a Ph.D. in theoretical chemistry from the University of Pennsylvania in 2018. His Ph.D. work focused on modeling non-adiabatic dynamics near surfaces. From 2018, He was a postdoc at UC Berkeley working on stochastic implementation of electronic structure theory for excited states. He started his independent career at Westlake in Jan. 2021. His research interests lie in nonadiabatic dynamics, open quantum systems, and stochastic implementation of electronic structure theory for excited states.

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