Here we experimentally demonstrate a triple phase transition, where a topological phase transition, a mobility phase transition and spontaneous PT-symmetry breaking coincide (Fig. 1). We consider a non-Hermitian Floquet quasicrystal with PT symmetry, supporting the non-Hermitian skin effect11,32,33,...
The demonstration of our method in the non-Hermitian Su-Schrieffer-Heeger model shows that exotic non-Hermitian topological phases of widely tunable numbers of edge states and Floquet topological Anderson insulator are induced by the periodic driving and the disorder. Our result supplies a useful way...
Non-trivial linking invariant encodes robust information of topological matter. It has been recently shown that the linking and winding of complex eigenenergy strings can classify one-dimensional non-Hermitian topological matter. However, in higher dimen
We construct a two-dimensional, discrete-time quantum walk, exhibiting non-Hermitian skin effects under openboundary conditions. As a confirmation of the non-Hermitian bulk-boundary correspondence, we show that the emergence of topological edge states is consistent with the Floquet winding number, ...
Triple phase transition, including topological phase transition, mobility phase transition and spontaneous PT-symmetry breaking, can be realized in a non-Hermitian Floquet quasicrystal with PT symmetry. The quasicrystal can be implemented in an optical system with controllable dissipation, consisting of cou...
Non-Hermitian physics has greatly enriched our understanding of nonequilibrium phenomena and uncovered novel effects such as the non-Hermitian skin effect (NHSE) that has profoundly revolutionized the field. NHSE has been predicted in systems with nonreciprocal couplings which, however, are challenging ...
题目:复旦理论物理报告会|Knot theory of non-Hermitian bands and exceptional points 报告人:胡海平 研究员 中国科学院物理所 时间:2022年4月29日(周五)9:30 主办方:复旦大学物理系 报告摘要:Non-Hermitian (NH) physics has emerged as an interdisciplinary research area during the past several years, fuel...
As a confirmation of the non-Hermitian bulk-boundary correspondence, we show that the emergence of topological edge states are consistent with Floquet ... T Li,YS Zhang,W Yi - 中国物理快报:英文版 被引量: 0发表: 2021年 New topological invariants in non-Hermitian systems. Modifications of adia...
The non-Hermitian skin effect (NHSE) is a fascinating phenomenon in nonequilibrium systems where eigenstates massively localize at the systems’ boundaries, pumping (quasi-)particles loaded in these systems unidirectionally to the boundaries. Its interpl
(2 + 1) yields a different flag manifold RP2and is relevant for the Floquet Euler phase14. Other tantalizing extensions include the 3D nodal-line metals8characterized by non-Abelian frame charges and non-Hermitian phases with non-Abelian band braidings51,52,53by relaxing the PT symmetry ...