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Complex frequency fingerprint

创建于2025年07月08日 星期二作者 : 李萍 浏览量 :

主讲人:杨哲森,厦门大学教授

时    间:2025年7月8日10:00

地    点:物电学院A栋112

联系人:张世豪


讲座摘要:In this talk, we will introduce an experimentally accessible method to detect the complex frequency Green’s function (GF). Unlike the real frequency GF, the complex frequency GF provides a richer description by capturing information about effective Hamiltonians in the entire complex plane. This approach enables the identification of the non-Hermitian skin effect (NHSE) by analyzing responses in nontrivial point gap topology regions, spectra, and eigenstates. Besides, it also facilitates quasiparticle resolution in the complex plane, offering new insights into quantum many-body systems and their interactions. Our method paves the way for exploring exotic phenomena in both non-Hermitian and quantum many-body systems, bridging theory and experiment across diverse physical areas.


主讲人简介杨哲森,厦门大学物理科学与技术学院教授。2020年毕业于中国科学院物理研究所,随后在中国科学院卡弗里理论科学研究所从事博士后研究工作。曾获2021年博士后创新人才计划和基金委优秀青年基金的支持,主要研究兴趣集中在非厄米系统的新奇物理现象,特别是非厄米趋肤效应。已发表Phys. Rev. Lett./Nat. Commun. 8篇。


Complex frequency fingerprint

2025-07-08

作者:杨哲森

浏览量:

主讲人:杨哲森,厦门大学教授

时    间:2025年7月8日10:00

地    点:物电学院A栋112

联系人:张世豪


讲座摘要:In this talk, we will introduce an experimentally accessible method to detect the complex frequency Green’s function (GF). Unlike the real frequency GF, the complex frequency GF provides a richer description by capturing information about effective Hamiltonians in the entire complex plane. This approach enables the identification of the non-Hermitian skin effect (NHSE) by analyzing responses in nontrivial point gap topology regions, spectra, and eigenstates. Besides, it also facilitates quasiparticle resolution in the complex plane, offering new insights into quantum many-body systems and their interactions. Our method paves the way for exploring exotic phenomena in both non-Hermitian and quantum many-body systems, bridging theory and experiment across diverse physical areas.


主讲人简介杨哲森,厦门大学物理科学与技术学院教授。2020年毕业于中国科学院物理研究所,随后在中国科学院卡弗里理论科学研究所从事博士后研究工作。曾获2021年博士后创新人才计划和基金委优秀青年基金的支持,主要研究兴趣集中在非厄米系统的新奇物理现象,特别是非厄米趋肤效应。已发表Phys. Rev. Lett./Nat. Commun. 8篇。


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