967 citations · 1.8k across the 13 of their papers we have counts for
13 papers
Optimized Two-Step Coarse Propagators in Parareal Algorithms
Guanglian Li, Qingle Lin, Kai Zhang +1
In this work, we propose a novel framework for accelerating the parareal algorithm, in which the coarse propagator is formulated as a two-step method and optimized with respect to…
Observation of Universal Spectral Moments and the Dynamic Dispersive-to-Proliferative Transition
Jia-Xin Zhong, Chang Shu, Nan Cheng +4
In non-Hermitian systems, spectra can be maximally boundary-sensitive, yet bulk physics need not be. Here we experimentally show that spectral moments provide boundary-robust bulk…
Dynamical Poles in Non-Hermitian Impurity Scattering
Ao Yang, Kai Zhang, Chen Fang
In Hermitian impurity scattering, each isolated late-time exponential is the fingerprint of a bound state. We show that this correspondence breaks down in non-Hermitian bands. For…
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…
Point-Gap Bound States in Non-Hermitian Systems
Zixi Fang, Chen Fang, Kai Zhang
In this paper, we systematically investigate the impurity-induced bound states in 1D non-Hermitian systems. By establishing an exact relationship between impurity potential and bou…
Loss-induced universal one-way transport in periodically driven systems
Chang Shu, Kai Zhang, Kai Sun
In this paper, we show that a periodically driven Aubry-André-Harper model with imbalanced on-site gain/loss supports universal one-way transport that is immune to impurities and i…
Geometry-dependent skin effect and anisotropic Bloch oscillations in a non-Hermitian optical lattice
Yi Qin, Kai Zhang, Linhu Li
The interplay between the non-Hermiticity and dimensionality gives rise to exotic characteristics in higher dimensions, with one representative phenomenon known as the geometry-dep…
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…
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…
Non-Hermitian bulk-boundary correspondence and auxiliary generalized Brillouin zone theory
Zhesen Yang, Kai Zhang, Chen Fang +1
We provide a systematic and self-consistent method to calculate the generalized Brillouin Zone (GBZ) analytically in one dimensional non-Hermitian systems, which helps us to unders…
Correspondence between winding numbers and skin modes in non-hermitian systems
Kai Zhang, Zhesen Yang, Chen Fang
We establish exact relations between the winding of "energy" (eigenvalue of Hamiltonian) on the complex plane as momentum traverses the Brillouin zone with periodic boundary condit…