492 citations · 4.1k across the 54 of their papers we have counts for
54 papers
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…
Extrinsic higher-order topological corner states in AB-stacked transition-metal dichalcogenides
Jiang Yao, Linhu Li
Higher-order topological insulators (HOTIs) are a novel type of topological phases which supports -dimensional topological boundary states in -dimensional systems with $D-d>1…
Occupation-dependent particle separation in one-dimensional non-Hermitian lattices
Yi Qin, Linhu Li
We unveil an exotic phenomenon arising from the intricate interplay between non-Hermiticity and many-body physics, namely an occupation-dependent particle separation for hardcore b…
Kinked linear response from non-Hermitian cold-atom pumping
Fang Qin, Ruizhe Shen, Linhu Li +1
It is well known that non-Hermitian, non-reciprocal systems may harbor exponentially localized skin modes. However, in this work, we find that, generically, non-Hermiticity gives r…
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…
Activating non-Hermitian skin modes by parity-time symmetry breaking
Zhoutao Lei, Ching Hua Lee, Linhu Li
Parity-time () symmetry is a cornerstone of non-Hermitian physics as it ensures real energies for stable experimental realization of non-Hermitian phenomena. In this…
Topological Non-Hermitian skin effect
Rijia Lin, Tommy Tai, Mengjie Yang +2
This article reviews recent developments in the non-Hermitian skin effect (NHSE), particularly on its rich interplay with topology. The review starts off with a pedagogical introdu…
Non-Hermitian boundary spectral winding
Zuxuan Ou, Yucheng Wang, Linhu Li
Spectral winding of complex eigenenergies represents a topological aspect unique in non-Hermitian systems, which vanishes in one-dimensional (1D) systems under the open boundary co…
Tunable symmetry-protected higher-order topological states with fermionic atoms in bilayer optical lattices
Zhoutao Lei, Linhu Li, Yuangang Deng
Higher-order topological states that possess gapped bulk energy bands and exotic topologically protected boundary states with at least two dimension lower than the bulk have signif…
Topological classification of Higher-order topological phases with nested band inversion surfaces
Zhoutao Lei, Yuangang Deng, Linhu Li
Higher-order topological phases (HOTPs) hold gapped bulk bands and topological boundary states localized in boundaries with codimension higher than one. In this paper, we provide a…
Anomalous Floquet non-Hermitian skin effect in a ring resonator lattice
He Gao, Haoran Xue, Zhongming Gu +6
We present a one-dimensional coupled ring resonator lattice exhibiting a variant of the non- Hermitian skin effect (NHSE) that we call the anomalous Floquet NHSE. Unlike existing a…
Direction reversal of non-Hermitian skin effect via coherent coupling
Linhu Li, Wei Xin Teo, Sen Mu +1
Absolute negative mobility (ANM) in nonequilibrium systems depicts the possibility of particles propagating toward the opposite direction of an external force. We uncover in this w…
Edge magnetism in transition metal dichalcogenide nanoribbons: Mean field theory and determinant quantum Monte Carlo
Francisco M. O. Brito, Linhu Li, João M. V. P. Lopes +1
Edge magnetism in zigzag transition metal dichalcogenide nanoribbons is studied using a three-band tight-binding model with local electron-electron interactions. Both mean field th…
Designing non-Hermitian real spectra through electrostatics
Russell Yang, Jun Wei Tan, Tommy Tai +4
Non-hermiticity presents a vast newly opened territory that harbors new physics and applications such as lasing and sensing. However, only non-Hermitian systems with real eigenener…
Anomalous hybridization of spectral winding topology in quantized steady-state responses
Hui-Qiang Liang, Sen Mu, Jiangbin Gong +1
Quantized response is one distinguishing feature of a topological system. In non-Hermitian systems, the spectral winding topology yields quantized steady-state response. By conside…
Arbitrary entangled state transfer via a topological qubit chain
Chong Wang, Linhu Li, Jiangbin Gong +1
Quantum state transfer is one of the basic tasks in quantum information processing. We here propose a theoretical approach to realize arbitrary entangled state transfer through a q…
Non-Hermitian pseudo mobility edge in a coupled chain system
Sen Mu, Longwen Zhou, Linhu Li +1
In this work, we explore interesting consequences arising from the coupling between a clean non-Hermitian chain with skin localization and a delocalized chain of the same length un…
Topological properties of non-Hermitian Creutz Ladders
Hui-Qiang Liang, Linhu Li
In this work we study topological properties of the one-dimensional Creutz ladder model with different non-Hermitian asymmetric hoppings and on-site imaginary potentials, and obtai…
Exact solution of single impurity problem in non-reciprocal lattices: impurity induced size-dependent non-Hermitian skin effect
Yanxia Liu, Yumeng Zeng, Linhu Li +1
Non-Hermitian non-reciprocal systems are known to be extremely sensitive to boundary conditions, exhibiting diverse localizing behaviors and spectrum structures when translational…
Non-Hermitian Pseudo-Gaps
Linhu Li, Ching Hua Lee
The notion of a band gap is ubiquitous in the characterization of matter. Particularly interesting are pseudo-gaps, which are enigmatic regions of very low density of states that h…
Delocalization of topological edge states
Weiwei Zhu, Wei Xin Teo, Linhu Li +1
The non-Hermitian skin effect (NHSE) in non-Hermitian lattice systems depicts the exponential localization of eigenstates at system's boundaries. It has led to a number of counter-…
Quantized classical response from spectral winding topology
Linhu Li, Sen Mu, Ching Hua Lee +1
Topologically quantized response is one of the focal points of contemporary condensed matter physics. While it directly results in quantized response coefficients in quantum system…
Point-gap topology with complete bulk-boundary correspondence in dissipative quantum systems
Jian-Song Pan, Linhu Li, Jiangbin Gong
The spectral and dynamical properties of dissipative quantum systems, as modeled by a damped oscillator in the Fock space, are investigated from a topological point of view. Unlike…
Impurity induced scale-free localization
Linhu Li, Ching Hua Lee, Jiangbin Gong
This work develops a full framework for non-Hermitian impurity physics in a non-reciprocal lattice, with PBCs, OBCs and even their interpolations being special cases across a whole…