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2019.6.12讲座预告

来源 : 浙江省物理实验教学示范中心     作者 : DWF     时间 : 2019-06-10

本周三物理系seminar我们请Stefan Kirchner 教授和Tharnier O. Puel博士给大家作报告,报告信息如下: 报告时间:2019-06-12,下午1点半 报告地点:勤园20-518 报告一: 报告题目:Quantum and classical liquids in a model of annealed disorder 报告简介:The Falicov-Kimball model, a testing ground for various approximation schemes to solve the strong correlation problem [1,2], has generated interest as a route to disorder-free many-body localization. On the square lattice and at half-filling, the model is non-metallic at all non-vanishing values of the Coulomb repulsion U and transitions from an Anderson to a Mott insulator [3]. Here, the recent results on the triangular lattice Falicov-Kimball model will be reported, based on Monte-Carlo evaluations of the partition functions and finite-size scaling [4] and several DMFT extensions including a Cluster-DMFT [2]. The results show how quantum liquids can emerge from their classical counterparts.

[1]A. Antipov, E. Gull, and S. Kirchner, Phys. Rev. Lett. vol. 112, 226401 (2014).

[2]Zuo-Dong Yu et al, in preparation (2019).

[3]A. Antipov, Y. Javanmard, P. Ribeiro, and S. Kirchner, Phys. Rev. Lett. vol. 117, 146601 (2016).

[4]M. Oliveira, P. Ribeiro and S. Kirchner, Phys. Rev. Lett. vol.122, in press (2019).


报告人简介:2002年在德国Technical University of Karlsruhe (now KIT)获博士学位,导师是国际著名物理学家 P. Wolfle 教授。2003年起在美国莱斯大学等学术机构做博士后研究,20092014年担任德国马普复杂系统物理研究所和马普固体化学物理研究所联合研究课题组长,20148月起作为浙江省海外高层次人才引进计划外专千人担任浙江大学关联物质中心特聘研究员和浙江大学物理系教授。Stefan Kirchner 教授的主要研究领域是理论凝聚态物理,侧重强关联电子体系,在非平衡态动力学输运、临界动力学和量子相变、纳米结构、非常规超导和磁性、重费米子、非费米液体和新奇物态、以及动力学平均场数值方法等方面的诸多研究工作具有重要的国际影响力。
报告二: 报告题目:Non-equilibrium phase transition on spin chain Ising model
报告摘要:The generalization of quantum phase transitions to non-equilibrium conditions raises a number of questions, in particular, if and how out-of-equilibrium critical phenomena can be categorized into universality classes, in analogy with thermal equilibrium. Here we explore the non-equilibrium steady-state of a transverse magnetic field Ising chain coupled at its ends to magnetic thermal reservoirs. We generalize the phase diagram [1] to non-equilibrium conditions obtained by applying a magnetization bias to the reservoirs [2]. Our findings show that out-of-equilibrium conditions allow for novel critical phenomena not possible at equilibrium.

[1] P. Ribeiro and V. R. Vieira, Phys. Rev. B 92, 100302(R) (2015).

[2] T. O. Puel and S. Chesi and S. Kirchner and P. Ribeiro, arXiv:1809.07219. Accepted in PRL.


报告人简介:Dr. Tharnier O. Puel researches different fields on Solid State Physics with focus on topological phases of matter and non-equilibrium systems. He specialized on phase transitions in topological superconductors during his PhD in 2014, shared between UFSC-Brasil and IST-Portugal. The next two years were spent in the Brazilian Center of Physical Research as Postdoctoral researcher, focusing on the effect of multi-bands on non-conventional superconductivity. In 2017, Dr. T. O. Puel has joint a Postdoctoral position at Beijing Computational Research Center and IST-Lisbon, during which he extended his research to the physics of non-equilibrium open quantum systems. Since April he joined the Correlated Quantum Matter Group at Zhejiang University.
欢迎各位老师前来听讲。