376 citations · 7.2k across the 150 of their papers we have counts for
18 papers · 1 filter
Knot topology of exceptional point and non-Hermitian no-go theorem
Haiping Hu, Shikang Sun, Shu Chen
Exceptional points (EPs) are peculiar band singularities and play a vital role in a rich array of unusual optical phenomena and non-Hermitian band theory. In this paper, we provide…
Information constraint in open quantum systems
Chun-Hui Liu, Shu Chen
We propose an effect called information constraint which is characterized by the existence of different decay rates of signal strengths propagating along opposite directions. It is…
Magnetized Topological Insulator Multilayers
Chao Lei, Shu Chen, Allan H. MacDonald
We discuss the magnetic and topological properties of bulk crystals and quasi-two-dimensional thin films formed by stacking intrinsic magnetized topological insulator ( for example…
Helical damping and anomalous critical non-Hermitian skin effect
Chun-Hui Liu, Kai Zhang, Zhesen Yang +1
Non-Hermitian skin effect and critical skin effect are unique features of non-Hermitian systems. In this Letter, we study an open system with its dynamics of single-particle correl…
Diagnosis of bulk phase diagram of non-reciprocal topological lattices by impurity modes
Yanxia Liu, Shu Chen
We study the single impurity problem in the non-Hermitian lattice described by the non-reciprocal Su-Schrieffer-Heeger model and obtain the phase diagram of localized bound states…
Topological classification of defects in non-Hermitian systems
Chun-Hui Liu, Shu Chen
We classify topological defects in non-Hermitian systems with point gap, real gap and imaginary gap for all the Bernard-LeClair classes or generalized Bernard-LeClair classes in al…
Topological invariants, zero mode edge states and finite size effect for a generalized non-reciprocal Su-Schrieffer-Heeger model
Hui Jiang, Rong Lü, Shu Chen
Intriguing issues in one-dimensional non-reciprocal topological systems include the breakdown of usual bulk-edge correspondence and the occurrence of half-integer topological invar…
Interplay of non-Hermitian skin effects and Anderson localization in non-reciprocal quasiperiodic lattices
Hui Jiang, Li-Jun Lang, Chao Yang +2
Non-Hermiticity from non-reciprocal hoppings has been shown recently to demonstrate the non-Hermitian skin effect (NHSE) under open boundary conditions (OBCs). Here we study the in…
Topological classification of non-Hermitian systems with reflection symmetry
Chun-Hui Liu, Hui Jiang, Shu Chen
We classify topological phases of non-Hermitian systems in the Altland-Zirnbauer classes with an additional reflection symmetry in all dimensions. By mapping the non-Hermitian syst…
Topological invariants and phase diagrams for one-dimensional two-band non-Hermitian systems without chiral symmetry
Hui Jiang, Chao Yang, Shu Chen
We study topological properties of one-dimensional non-Hermitian systems without chiral symmetry and give phase diagrams characterized by topological invariants and $ν_{total…
Geometrical meaning of winding number and its characterization of topological phases in one-dimensional chiral non-Hermitian systems
Chuanhao Yin, Hui Jiang, Linhu Li +2
We unveil the geometrical meaning of winding number and utilize it to characterize the topological phases in one-dimensional chiral non-Hermitian systems. While chiral symmetry ens…
Characterization of Lifshitz transitions in topological nodal line semimetals
Hui Jiang, Linhu Li, Jiangbin Gong +1
We introduce a two-band model of three-dimensional nodal line semimetals, the Fermi surface of which at half-filling may form various one-dimensional configurations of different to…
Chiral topological insulating phases from three-dimensional nodal loop semimetals
Linhu Li, Chuanhao Yin, Shu Chen +1
We identify a topological Z index for three dimensional chiral insulators with P*T symmetry where two Hamiltonian terms define a nodal loop. Such systems may belong in the AIII or…
Transport through a quantum dot coupled to two Majorana bound states
Qi-Bo Zeng, Shu Chen, L. You +1
We investigate electron transport inside a ring system composed of a quantum dot (QD) coupled to two Majorana bound states confined at the ends of a one-dimensional topological sup…
Kaleidoscope of symmetry protected topological phases in one-dimensional periodically modulated lattices
Huaiming Guo, Shu Chen
We identify the existence of various symmetry-protected topological states in one-dimensional superlattices with periodically modulated hopping amplitudes or on-site potentials, wh…
Topological phases of generalized Su-Schrieffer-Heeger models
Linhu Li, Zhihao Xu, Shu Chen
We study the extended Su-Schrieffer-Heeger model with both the nearest-neighbor and next-nearest-neighbor hopping strengths being cyclically modulated and find the family of the mo…
Effect of incommensurate disorder on the resonant tunneling through Majorana bound states on the topological superconductor chains
Pei Wang, Shu Chen, Gao Xianlong
We study the transport through the Kitaev's chain with incommensurate potentials coupled to two normal leads by the numerical operator method. We find a quantized linear conductanc…
Properties of A Class of Topological Phase Transition
Zi Cai, Shu Chen, Supeng Kou +1
The properties of a class of topological quantum phase transition (TQPT) are analyzed based on a model proposed by Haldane. We study the effect of finite temperature on this phase…