477 citations · 2k across the 26 of their papers we have counts for
27 papers
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…
Light-induced half-quantized Hall effect and axion insulator
Fang Qin, Ching Hua Lee, Rui Chen
Motivated by the recent experimental realization of the half-quantized Hall effect phase in a three-dimensional (3D) semi-magnetic topological insulator [M. Mogi et al., Nature Phy…
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…
Proposal for Observing Yang-Lee Criticality in Rydberg Atomic Arrays
Ruizhe Shen, Tianqi Chen, Mohammad Mujahid Aliyu +4
Yang-Lee edge singularities (YLES) are the edges of the partition function zeros of an interacting spin model in the space of complex control parameters. They play an important rol…
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…
Universal competitive spectral scaling from the critical non-Hermitian skin effect
Fang Qin, Ye Ma, Ruizhe Shen +1
Recently, it was discovered that certain non-Hermitian systems can exhibit qualitative different properties at different system sizes, such as being gapless at small sizes and havi…
Light-induced phase crossovers in a quantum spin Hall system
Fang Qin, Ching Hua Lee, Rui Chen
In this work, we theoretically investigate the light-induced topological phases and finite-size crossovers in a paradigmatic quantum spin Hall (QSH) system with high-frequency pump…
Dimensional transmutation from non-Hermiticity
Hui Jiang, Ching Hua Lee
Dimensionality plays a fundamental role in the classification of novel phases and their responses. In generic lattices of 2D and beyond, however, we found that non-Hermitian coupli…
Hyperbolic fringe signal for twin impurity quasiparticle interference
Peize Ding, Tilman Schwemmer, Ching Hua Lee +2
We study the quasiparticle interference (QPI) pattern emanating from a pair of adjacent impurities on the surface of a gapped superconductor (SC). We find that hyperbolic fringes (…
Observation of cnoidal wave localization in non-linear topolectric circuits
Hendrik Hohmann, Tobias Hofmann, Tobias Helbig +12
We observe a localized cnoidal (LCn) state in an electric circuit network. Its formation derives from the interplay of non-linearity and the topology inherent to a Su-Schrieffer-He…
Experimental identification of the second-order non-Hermitian skin effect with physics-graph-informed machine learning
Ce Shang, Shuo Liu, Ruiwen Shao +11
Topological phases of matter are conventionally characterized by the bulk-boundary correspondence in Hermitian systems: The topological invariant of the bulk in dimensions corr…
Real Non-Hermitian Energy Spectra Without Any Symmetry
Boxue Zhang, Qingya Li, Xiao Zhang +1
Non-Hermitian models with real eigenenergies are highly desirable for their stability. Yet, most of the currently known ones are constrained by symmetries such as PT-symmetry, whic…
Non-Hermitian Squeezed Polarons
Fang Qin, Ruizhe Shen, Ching Hua Lee
Recent experimental breakthroughs in non-Hermitian ultracold atomic lattices have dangled tantalizing prospects in realizing exotic, hitherto unreported, many-body non-Hermitian qu…
Diagnosis of pairing symmetry by vortex and edge spectra in kagome superconductors
Peize Ding, Ching Hua Lee, Xianxin Wu +1
Layered kagome metals AV3Sb5 (A=K, Rb, Cs) exhibit diverse correlated electron phenomena. It includes charge density wave formation and superconductivity the pairing symmetry of wh…
Filling up complex spectral regions through non-Hermitian disordered chains
Hui Jiang, Ching Hua Lee
Eigenspectra that fill regions in the complex plane have been intriguing to many, inspiring research from random matrix theory to esoteric semi-infinite bounded non-Hermitian latti…
Simulating hyperbolic space on a circuit board
Patrick M. Lenggenhager, Alexander Stegmaier, Lavi K. Upreti +12
The Laplace operator encodes the behavior of physical systems at vastly different scales, describing heat flow, fluids, as well as electric, gravitational, and quantum fields. A ke…
Exceptional Bound States and negative Entanglement Entropy
Ching Hua Lee
This work introduces a new class of robust states known as Exceptional Boundary (EB) states, which are distinct from the well-known topological and non-Hermitian skin boundary stat…
Nonlinearity induced topological physics in momentum space and real space
Thomas Tuloup, Raditya Weda Bomantara, Ching Hua Lee +1
Nonlinearity induced topological properties in nonlinear lattice systems are studied in both momentum space and real space. Experimentally realizable through the Kerr effect on pho…
Many-Body Topological and Skin States without Open Boundaries
Ching Hua Lee
Robust boundary states have been the focus of much recent research, both as topologically protected states and as non-Hermitian skin states. In this work, we show that many-body ef…
Critical non-Hermitian Skin Effect
Linhu Li, Ching Hua Lee, Sen Mu +1
This work uncovers a new class of criticality where eigenenergies and eigenstates of non-Hermitian lattice systems jump discontinuously across a critical point in the thermodynamic…
Quenched topological boundary modes can persist in a trivial system
Ching Hua Lee, Justin C. W. Song
Topological boundary modes can occur at the spatial interface between a topological and gapped trivial phase and exhibit a wavefunction that exponentially decays in the gap. Here w…
Unraveling non-Hermitian pumping: emergent spectral singularities and anomalous responses
Ching Hua Lee, Linhu Li, Ronny Thomale +1
Within the expanding field of non-Hermitian physics, non-Hermitian pumping has emerged as a key phenomenon, epitomized through the skin effect via extensive boundary mode accumulat…
Emergent Fermi surface in a many-body non-Hermitian Fermionic chain
Sen Mu, Ching Hua Lee, Linhu Li +1
Quantum degeneracy pressure (QDP) underscores the stability of matter and is arguably the most ubiquitous many-body effect. The associated Fermi surface (FS) has broad implications…
Orbital anisotropy underlying the superconducting dome in BaFe(AsP) superconductors
T. Sonobe, T. Shimojima, A. Nakamura +8
We investigate the in-plane anisotropy of Fe 3d orbitals occurring in a wide temperature and composition range of BaFe2(As1-xPx)2 system. By employing the angle-resolved photoemiss…