主讲人：任捷 教授 (同济大学)

题目：量子热输运的代数图论分析-Hill圈图与圈流排序

Cycle Flux Ranking of Network Analysis in Quantum Thermal Transport

时间：2022年07月02日上午10：00

会议ID：（腾讯会议）274-761-428

报告摘要：

Manipulating quantum thermal transport relies on uncovering the principle working cycles of quantum devices. Here, I will talk about the Hill’s cycle flux ranking of network analysis to nonequilibrium thermal devices characterized as quantum transition network. Mapping the dissipative quantum thermal devices into networks of quantum state transitions provides a way to decompose the network into cycle trajectories, and collect the Hill’s cycle fluxes by algebraic graph theory. With the help of selecting the top-ranked cycle fluxes, i.e., the cycle trajectories with highest probabilities, we can excavate the principle mechanism out of complex transport behaviors.

We then exemplify the cycle flux ranking in typical quantum device models, e.g., a thermal-drag spin Seebeck pump and a quantum thermal transistor. The top ranked cycle trajectories indeed elucidate the principal working mechanisms. Therefore, cycle flux ranking provides an alternative perspective that naturally describes the working cycle corresponding to the main functionality of quantum thermal devices, which would further guide the device optimization with desired performance.

个人简介：

任捷，同济大学长聘正教授。2006年和2011年分别在中国科学技术大学和新加坡国立大学获得理学学士和博士学位。2012年至2015年先后在美国洛斯阿拉莫斯国家实验室和MIT从事博士后研究。15年加盟同济大学物理学院。长期从事量子声子学与热输运、复杂人工微结构、非平衡统计物理的基本问题，探索“几何拓扑-对称破缺-功能性质”的涌现原理。发表论文100余篇，总引用5120次，H-index 32。任《中国物理快报》《中国物理B》《物理学报》《物理》四刊青年编委，中国物理学会秋季年会组委会委员。