967 citations · 3.2k across the 30 of their papers we have counts for
31 papers
Non-Bloch Dynamical Quantum Phase Transitions with Memory
Zhesen Yang, Wei-Wei Yang, Henning Schomerus +1
Dynamical quantum phase transitions (DQPTs) of periodic chains are determined by real Bloch momenta. We identify non-Bloch DQPTs, which occur only in open chains and are determined…
Emergent Non-Biorthogonal Born Rule at Dynamical Quantum Phase Transitions
Wei-Wei Yang, Henning Schomerus, Jiangping Hu +1
Non-Hermitian dynamics possesses distinct left and right eigenstates, but their normalization freedom obscures a direct probabilistic interpretation. Starting from a globally Hermi…
Universal Generalized Brillouin Zone Theory I: Review of the Spectral Approach
Zeqi xu, Jiangping Hu, Zhesen Yang
This series of papers aims to establish a universal generalized Brillouin zone (GBZ) theory for higher-dimensional non-Hermitian systems. As the starting point of this series, we e…
Non-Hermitian Quantum Mechanics I: Instantaneous Self-Energy
Lingfeng Liu, Wei-Wei Yang, Jiangping Hu +1
Starting from the unitary evolution of a closed quantum system, we rigorously demonstrate that the projection of the global wavefunction onto an arbitrary local subsystem is govern…
Complex Frequency Fingerprint: Interacting Driven Non-Hermitian Skin Effect
Zhesen Yang, Zihan Wang, Juntao Huang +2
The excitation properties of quantum many-body systems are encoded in their response functions. These functions define an associated response Hamiltonian, which is intrinsically no…
Anomalous Scaling Behaviors of the Green's Function in Critical Skin Effects
Yifei Yi, Zhesen Yang
We study the Green's functions in non-Hermitian systems exhibiting the critical non-Hermitian skin effect (critical NHSE) using a double-chain Hatano-Nelson model with inter-chain…
Exceptional deficiency of non-Hermitian systems
Zhen Li, Xulong Wang, Rundong Cai +5
Exceptional points (EPs) are non-Hermitian singularities associated with the coalescence of individual eigenvectors accompanied by the degeneracy of their complex energies. Here, w…
Complex Frequency Detection in a Subsystem
Juntao Huang, Jiangping Hu, Zhesen Yang
In this study, we systematically explore the non-Hermitian skin effect (NHSE) and its associated complex-frequency detection in the context of a frequency-dependent non-Hermitian H…
Complex Frequency Fingerprint: Basic Concept and Theory
Juntao Huang, Kun Ding, Jiangping Hu +1
We introduce the complex frequency fingerprint (CFF), an experimentally accessible method for detecting the complex frequency Green's function (GF). Unlike the real frequency GF, w…
An Explicit Wavefunction of the Interacting Non-Hermitian Spin-1/2 1D System
Yue Wang, Xiangyu Zhang, Zhesen Yang +1
We present an explicit Bethe-ansatz wavefunction to a 1D spin- interacting fermion system, manifesting a many-body resonance resulting from the interplay between inter…
Two-dimensional Asymptotic Generalized Brillouin Zone Theory
Zeqi Xu, Bo Pang, Kai Zhang +1
In this work, we propose a theory on the two-dimensional non-Hermitian skin effect by resolving two representative minimal models. Specifically, we show that for any given non-Herm…
Edge theory of non-Hermitian skin modes in higher dimensions
Kai Zhang, Zhesen Yang, Kai Sun
In this paper, we establish an effective edge theory to characterize non-Hermitian edge-skin modes in higher dimensions. We begin by proposing a bulk projection criterion to straig…
Effective model and pairing tendency in bilayer Ni-based superconductor LaNiO
Yuhao Gu, Congcong Le, Zhesen Yang +2
Since the discovery of cuprate, the origin of high-T superconductivity has been an outstanding puzzle. Recently, high-T superconductivity was observed in a bilayer nickelat…
Observation of dynamical degeneracy splitting for the non-Hermitian skin effect
Tuo Wan, Kai Zhang, Junkai Li +2
The non-Hermitian skin effect is a distinctive phenomenon in non-Hermitian systems, which manifests as the anomalous localization of bulk states at the boundary. To understand the…
Dynamical Degeneracy Splitting and Directional Invisibility in Non-Hermitian Systems
Kai Zhang, Chen Fang, Zhesen Yang
In this paper, we introduce the concept of dynamical degeneracy splitting to describe the anisotropic decay behaviors in non-Hermitian systems. We demonstrate that systems with dyn…
Theoretical Prediction of Non-Hermitian Skin Effect in Ultracold Atom Systems
Sibo Guo, Chenxiao Dong, Fuchun Zhang +2
Non-Hermitian skin effect, which refers to the phenomenon that an extensive number of eigenstates are localized at the boundary, has been widely studied in lattice models and exper…
Generalized Fermion Doubling Theorems: Classification of 2D Nodal Systems in Terms of Wallpaper Groups
Congcong Le, Zhesen Yang, Fan Cui +2
The Nielsen-Ninomiya Theorem has set up a ground rule for the minimal number of the topological points in a Brillouin zone. Notably, in the 2D Brillouin zone, chiral symmetry and s…
Universal non-Hermitian skin effect in two and higher dimensions
Kai Zhang, Zhesen Yang, Chen Fang
Skin effect, experimentally discovered in one dimension, describes the physical phenomenon that on an open chain, an extensive number of eigenstates of a non-Hermitian hamiltonian…
Non-perturbative Breakdown of Bloch's Theorem and Hermitian Skin Effects
Zhesen Yang
In conventional Hermitian systems with the open boundary condition, Bloch's theorem is perturbatively broken down, which means although the crystal momentum is not a good quantum n…
Intrinsic dissipative Floquet superconductors beyond mean-field theory
Qinghong Yang, Zhesen Yang, Dong E. Liu
We study the intrinsic superconductivity in a dissipative Floquet electronic system in the presence of attractive interactions. Based on the functional Keldysh theory beyond the me…
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…
Dissipative Floquet Majorana modes in proximity-induced topological superconductors
Zhesen Yang, Qinghong Yang, Jiangping Hu +1
We study a realistic Floquet topological superconductor, a periodically driven nanowire proximitized to an equilibrium s-wave superconductor. Due to both strong energy and density…
Non-Hermitian skin modes induced by on-site dissipations and chiral tunneling effect
Yifei Yi, Zhesen Yang
In this paper, we study the conditions under which on-site dissipations can induce non-Hermitian skin modes in non-Hermitian systems. When the original Hermitian Hamiltonian has sp…
The Bulk-boundary Correspondence in Non-Hermitian Hopf-link Exceptional Line Semimetals
Zhicheng Zhang, Zhesen Yang, Jiangping Hu
We consider a 3-dimensional (3D) non-Hermitian exceptional line semimetal model and take open boundary conditions in x, y, and z directions separately. In each case, we calculate t…