138 citations · 2.2k across the 65 of their papers we have counts for
65 papers
and anti- phase transitions in a trimerized Su--Schrieffer--Heeger chain with nonreciprocal Rashba spin-orbit coupling
Milad Jangjan, Linhu Li, Longwen Zhou +1
We theoretically investigate a one-dimensional trimerized Su--Schrieffer--Heeger chain with three sublattices per unit cell subjected to a nonreciprocal Rashba spin-orbit coupling.…
Non-Hermitian topological Euler insulators
Longwen Zhou
Topological Euler insulators emerge in multiband systems with real Bloch Hamiltonians and wavefunctions. Their fragile topologies are characterized by the Euler class of degenerate…
Topological metal-insulator transitions in one-dimensional non-Hermitian quasicrystals: beyond PT-symmetry
Guangjie Zhang, Bing Shao, Longwen Zhou +2
One-dimensional non-Hermitian quasicrystals with parity and time-reversal (PT) symmetry can simultaneously exhibit localization-delocalization transition, topological phase transit…
Lateral Shift as a Control Knob for Localization Transitions in a Quasiperiodic Ladder
Bing Shao, Guangjie Zhang, Longwen Zhou +2
This work reports rich localization-delocalization transitions in a quasiperiodic ladder, of which the two legs are subject to the same quasiperiodic onsite potential but can be sh…
Topology and edge modes surviving criticality in non-Hermitian Floquet systems
Longwen Zhou
The discovery of critical points that can host quantized nonlocal order parameters and degenerate edge modes relocate the study of symmetry-protected topological phases (SPTs) to g…
Coupled-wire construction of non-Abelian higher-order topological phases
Jiaxin Pan, Longwen Zhou
Non-Abelian topological charges (NATCs), characterized by their noncommutative algebra, offer a framework for describing multigap topological phases beyond conventional Abelian inv…
Topological characterization of phase transitions and critical edge states in one-dimensional non-Hermitian systems with sublattice symmetry
Longwen Zhou, Rujia Jing, Shenlin Wu
Critical edge states appear at the bulk gap closing points of topological transitions. Their emergence signify the existence of topologically nontrivial critical points, whose desc…
Floquet Möbius topological insulators
Longwen Zhou, Fan Zhang, Jiaxin Pan
Möbius topological insulators have dispersive edge bands with Möbius twists in momentum space, which are protected by the combination of chiral and -projective translational s…
Observing the exponential growth of the eigenmodes in the absence of coalescence for a non-Hermitian circuit with an unavoidable inductor dissipation
Jiaming Zhang, Wenxuan Song, Hanhao Li +5
We investigate, both experimentally and theoretically, the eigenmodes of an electronic circuit in which gain and loss resonators are coupled through a capacitor. Due to the u…
Floquet non-Abelian topological charges and edge states
Jiaxin Pan, Longwen Zhou
Non-Abelian topological insulators are characterized by matrix-valued, non-commuting topological charges with regard to more than one energy gap. Their descriptions go beyond the c…
Gapless higher-order topology and corner states in Floquet systems
Longwen Zhou, Rongtao Wang, Jiaxin Pan
Higher-order topological phases (HOTPs) possess localized and symmetry-protected eigenmodes at corners and along hinges in two and three dimensional lattices. The numbers of these…
Two-body interaction induced phase transitions and intermediate phases in nonreciprocal non-Hermitian quasicrystals
Yalun Zhang, Longwen Zhou
Non-Hermitian phenomena, such as exceptional points, non-Hermitian skin effects, and topologically nontrivial phases have attracted continued attention. In this work, we reveal how…
Topological edge states at Floquet quantum criticality
Longwen Zhou, Jiangbin Gong, Xue-Jia Yu
Topologically protected edge states exactly at topological phase boundaries challenge the conventional belief that topological states must be associated with a bulk energy gap. Bec…
Quantum geometry and geometric entanglement entropy of one-dimensional Floquet topological matter
Longwen Zhou
The geometry of quantum states could offer indispensable insights for characterizing the topological properties, phase transitions and entanglement nature of many-body systems. In…
Multiple topological transitions and spectral singularities in non-Hermitian Floquet systems
Weiwei Zhu, Longwen Zhou, Linhu Li +1
The interplay between Floquet driving and non-Hermitian gain/loss could give rise to intriguing phenomena including topological funneling of light, edge-state delocalization, anoma…
Entanglement phase transitions in non-Hermitian Kitaev chains
Longwen Zhou
The intricate interplay between unitary evolution and projective measurements could induce entanglement phase transitions in the nonequilibrium dynamics of quantum many-particle sy…
Entanglement phase transitions in non-Hermitian Floquet systems
Longwen Zhou
The competition between unitary time-evolution and quantum measurements could induce phase transitions in the entanglement characteristics of quantum many-body dynamics. In this wo…
Correlation-induced phase transitions and mobility edges in an interacting non-Hermitian quasicrystal
Tian Qian, Yongjian Gu, Longwen Zhou
Non-Hermitian quasicrystal constitutes a unique class of disordered open system with PT-symmetry breaking, localization and topological triple phase transitions. In this work, we u…
Entanglement phase transitions in non-Hermitian quasicrystals
Longwen Zhou
The scaling law of entanglement entropy could undergo qualitative changes during the nonunitary evolution of a quantum many-body system. In this work, we uncover such entanglement…
Non-Hermitian Floquet Topological Matter -- A Review
Longwen Zhou, Da-Jian Zhang
The past few years have witnessed a surge of interest in non-Hermitian Floquet topological matters due to their exotic properties resulting from the interplay between driving field…
Floquet topological superconductors with many Majorana edge modes: topological invariants, entanglement spectrum and bulk-edge correspondence
Hailing Wu, Shenlin Wu, Longwen Zhou
One-dimensional Floquet topological superconductors possess two types of degenerate Majorana edge modes at zero and quasieneriges, leaving more room for the design of boundary…
Non-Abelian generalization of non-Hermitian quasicrystal: PT-symmetry breaking, localization, entanglement and topological transitions
Longwen Zhou
Non-Hermitian quasicrystal forms a unique class of matter with symmetry-breaking, localization and topological transitions induced by gain and loss or nonreciprocal effects. In thi…
Generating many Majorana corner modes and multiple phase transitions in Floquet second-order topological superconductors
Longwen Zhou
A -dimensional, th-order topological insulator or superconductor has localized eigenmodes at its -dimensional boundaries (). In this work, we apply periodic d…
Observation of Floquet topological phases with large Chern numbers
Kai Yang, Shaoyi Xu, Longwen Zhou +7
One of the most intriguing advantage of Floquet engineering is to generate new phases with large topological invariants. In this work, we experimentally simulate a periodically que…