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题   目：Non-Hermitian Bulk-Boundary Correspondence in Quantum-Walk Dynamics

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Bulk-boundary correspondence, a centralprinciple in topological matter relating bulk topological invariants to edgestates, fails in a general class of non-Hermitian systems. In this talk, we show that the breakdown of bulk-boundary correspondence also occurs for discrete-time quantum walks, a particular type of Floquet dynamics, when an appropriate form of non-unitarity is introduced. Based on the understanding of static non-Hermitian topological models, we define non-Bloch topological invariants for the quantum-walk dynamics, which give rise to the non-Hermitian bulk-boundary correspondence. We experimentally confirm our theoretical predictions by observing non-Hermitian skin effect and non-Hermitian bulk-boundary correspondence in discrete-time non-unitary quantum-walk dynamics of single photons. Our work establishes the non-Hermitian bulk-boundary correspondence as a general principle underlying non-Hermitian topological systems, and paves the way for a complete understanding of topological matter in open systems.

个人简介

会议简介

第五届量子信息、时空、拓扑态国际会议( QuIST V) 于2019年8月2日-8月9日在云南省昆明市召开。 本次会议有100余名国内外相关领域的专家学者参会，其中多位特邀国际知名专家学者作了精彩的学术报告， 会议包括主题报告、分组报告、墙报、自由讨论等环节。此次国际学术会议的召开为相关领域的专家学者提供面对面的学术交流平台，促进该领域研究中心的建立，并进一步推动这一领域的发展。

主办方：复旦大学、中国科学技术大学、佛罗里达大西洋大学、云南大学

●【学术视频】第五届量子信息、时空、拓扑态国际会议 | 多特蒙德工业大学Suter Dieter 教授：Optimal Control of Spin Qubits in Hybrid Quantum Registers

●【学术视频】第五届量子信息、时空、拓扑态国际会议 | 加州理工学院Xie Chen副教授：Foliated Fracton Order

●【学术视频】量子非平衡现象计算方法与应用培训研讨会 | 中科院武汉物理与数学研究所管习文研究员：Emergent Hydrodynamics in a 1D Bose-Fermi Mixture

●【学术视频】第二届ICQD青年科学家论坛 | 北京大学刘雄军教授：Emergent topology and symmetry-breaking order in correlated quench dynamics

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