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88038威尼斯(中国)官方网站學院“博約學術論壇”-楊哲森-第436期

來源:秦盛山 作者:楊哲森 教授 發布時間:2024-03-21

邀請人: 秦盛山

報告人: 楊哲森 教授

時間: 2024-03-21

地點: 良鄉校區,88038威尼斯(中国)官方网站實驗杨义山中心229會議室

主講人簡介:

-88038威尼斯(中国)官方网站學院博約學術論壇系列報告

436

題目非厄米趨膚效應和廣義布裏淵區理論

報告人:楊哲森 教授

間:2024.03.21 (周四) 下午230

點:良鄉校區,88038威尼斯(中国)官方网站實驗中229會議室

摘要:

非厄米趨膚效應是近兩年來理論和實驗的研究熱點之一,它是指在一個無队伍雜質、無相互作用的開邊界系統中,本征波函數可以都局域在邊界的一類新奇現象。非厄米趨膚效應的出現意味著傳統布音箱洛赫定理及能帶理論的失效。為了定量的刻畫非厄米趨膚效應,人們發展了廣義布〖裏淵區理論。在本次報⌒ 告中,我將會介紹:

(1)什麽是非厄删了吧米趨膚效應;

(2)什麽是廣義布理淵區理論;

(3)如何在凝聚態系統中實現以及探測非厄米趨膚效應;

(4)二維々廣義布裏淵區理論及其挑戰;

參考文獻:

[1] Kai Zhang*, Zhesen Yang*, and Chen Fang?, Phys. Rev. Lett. 125, 126402 (2020).

[2] Zhesen Yang*, Kai Zhang*, Chen Fang?, and Jiangping Hu?, Phys. Rev. Lett. 125, 226402 (2020).

[3] Kai Zhang, Zhesen Yang?, and Chen Fang?, Nat Commun 13, 2496 (2022).

[4] Yifei Yi, and Zhesen Yang?, Phys. Rev. Lett. 125, 186802 (2020).

[5] Kai Zhang, Chen Fang?, and Zhesen Yang?, Phys. Rev. Lett. 131, 036402 (2023).

[6] Zeqi Xu, Bo Pang, Kai Zhang? and Zhesen Yang?, arXiv:2311.16868

簡歷

楊哲森,廈門大學88038威尼斯(中国)官方网站科學與技術學院灯芯教授。2020年畢業於中國科學院♀88038威尼斯(中国)官方网站研究所,隨後在中國科學院卡弗裏理論科學研究所從事枝末烦恼博士後研究工作。曾獲2021年博士後創新人才計劃和基金委優秀青年基金的支持,主要研究興趣集中在非厄米系統的新奇88038威尼斯(中国)官方网站現象,特別是非厄米趨膚效應。

聯系方式qinshengshan@bit.edu.cn

邀請人: 秦盛山

址:/

承辦單位:88038威尼斯(中国)官方网站學院先進光電量子結構設計與測量教育部重點感觉到自己實驗室

*TitleNon-Hermitian Skin Effect and Generalized Brillouin Zone Theory

*ReporterProf. Zhesen Yang

*Time2024.03.21 (Thursday) 230 pm

*PlaceRoom 229 Physics Experiment Center, Liangxiang Campus

*Contact Person: Shengshan Qin

*Abstract: The non-Hermitian skin effect has emerged as a prominent topic of theoretical and experimental research in recent years. It refers to a fascinating phenomenon where the eigenstate wave functions can be localized near the boundaries in an open system. The appearance of the non-Hermitian skin effect signifies the breakdown of traditional Bloch’s theorem and band theory. To quantitatively characterize this effect, researchers have developed the Generalized Brillouin Zone Theory. In this presentation, I will cover the following points:

1. What is the non-Hermitian skin effect?

2. Introduction to the Generalized Brillouin Zone Theory.

3. Methods for realizing and detecting the non-Hermitian skin effect in condensed matter systems.

4. Challenges related to two-dimensional Generalized Brillouin Zone Theory.

Refereces:

[1] Kai Zhang*, Zhesen Yang*, and Chen Fang?, Phys. Rev. Lett. 125, 126402 (2020).

[2] Zhesen Yang*, Kai Zhang*, Chen Fang?, and Jiangping Hu?, Phys. Rev. Lett. 125, 226402 (2020).

[3] Kai Zhang, Zhesen Yang?, and Chen Fang?, Nat Commun 13, 2496 (2022).

[4] Yifei Yi, and Zhesen Yang?, Phys. Rev. Lett. 125, 186802 (2020).

[5] Kai Zhang, Chen Fang?, and Zhesen Yang?, Phys. Rev. Lett. 131, 036402 (2023).

[6] Zeqi Xu, Bo Pang, Kai Zhang? and Zhesen Yang?, arXiv:2311.16868

*ProfileZhesen Yang is a professor at the School of Physical Science and Technology, Xiamen University. He graduated from the Institute of Physics, Chinese Academy of Sciences, in 2020 and subsequently conducted postdoctoral research at the Kavli Institute for Theoretical Sciences, Chinese Academy of Sciences. He has received support from the 2021 Postdoctoral Innovation Talent Program and the National Natural Science Foundation of China for Outstanding Young Scholars. His primary research interests lie in novel physical phenomena in non-Hermitian systems, particularly the non-Hermitian skin effect.

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"88038威尼斯,88038威尼斯(中国)官方网站,威澳门尼斯人官网欢迎您"ptekcorp.com