Dissipation Enhanced Unidirectional Transport in Topological Systems
arXiv:2311.09534 · doi:10.1103/PhysRevB.109.165402
Abstract
Dissipation is a common occurrence in real-world systems and is generally considered to be detrimental to transport. In this study, we examine the transport properties of a narrow quantum anomalous Hall system with dissipation applied on one edge. When the Fermi level resides within the hybridization gap, we find that while transport is suppressed on one edge, it is significantly enhanced on the other. We reveal that this enhancement arises from dissipation-induced gap closure, which is deeply rooted in the point gap topology of the system, resulting in a reduction of the decaying coefficient. When the dissipation is very large, we find that the low-energy physics is nearly indistinguishable from a narrower system, whose dissipation amplitude is inversely proportional to that of the original one. To get more physical intuition, we demonstrate that the low-energy physics can be well captured by a pair of coupled counter-propagating chiral edge states, one of which has a modified group velocity and an effective dissipation. We also briefly discuss the possible experimental realizations of this enhanced unidirectional transport.
References in corpus (81)
- Topological Insulators
- Topological insulators and superconductors
- Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
- Topological Photonics
- Classification of topological quantum matter with symmetries
- Experimental realisation of the topological Haldane model
- Edge states and topological invariants of non-Hermitian systems
- Time-dependent transport in interacting and non-interacting mesoscopic systems
- Complex Extension of Quantum Mechanics
- Exceptional Topology of Non-Hermitian Systems
- Non-Hermitian Physics
- Higher-Order Topological Insulators
- Colloquium: Topological Band Theory
- Topological phases of non-Hermitian systems
- The physics of exceptional points
- Symmetry and Topology in Non-Hermitian Physics
- Biorthogonal Bulk-Boundary Correspondence in Non-Hermitian Systems
- Topological Origin of Non-Hermitian Skin Effects
- Topological Band Theory for Non-Hermitian Hamiltonians
- Anomalous edge state in a non-Hermitian lattice
- Non-Bloch Band Theory of Non-Hermitian Systems
- Correspondence between winding numbers and skin modes in non-hermitian systems
- Non-Hermitian Chern bands
- Topological quantization of the spin Hall effect in two-dimensional paramagnetic semiconductors
- Non-Hermitian Boundary Modes
- Spawning rings of exceptional points out of Dirac cones
- Anatomy of skin modes and topology in non-Hermitian systems
- Non-Hermitian robust edge states in one-dimension: Anomalous localization and eigenspace condensation at exceptional points
- Non-Hermitian skin effect and chiral damping in open quantum systems
- Non-Hermitian Topology and Exceptional-Point Geometries
- Non-Hermitian bulk-boundary correspondence and auxiliary generalized Brillouin zone theory
- Classical higher-order topological insulators
- Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas
- Colloquium: Quantum anomalous Hall effect
- Finite size effects of helical edge states in HgTe/CdTe quantum wells
- Hybrid higher-order skin-topological modes in non-reciprocal systems
- Second-Order Topological Phases in Non-Hermitian Systems
- Synthetic gauge fields and Weyl point in Time-Reversal Invariant Acoustic Systems
- Non-Hermitian topological phenomena: A review
- Observation of hybrid higher-order skin-topological effect in non-Hermitian topolectrical circuits
- Higher-order non-Hermitian skin effect
- New topological invariants in non-Hermitian systems
- Experimental realization of a Weyl exceptional ring
- Observation of higher-order non-Hermitian skin effect
- Non-Hermitian skin modes induced by on-site dissipations and chiral tunneling effect
- Topological Non-Hermitian skin effect
- Topology-Induced Spontaneous Non-reciprocal Pumping in Cold-Atom Systems with Loss
- Higher-order topological corner states induced by gain and loss
- Quantum Noise Theory of Exceptional Point Sensors
- Numerical study of the topological Anderson insulator in HgTe/CdTe quantum wells
- Topological unification of time-reversal and particle-hole symmetries in non-Hermitian physics
- Encircling an Exceptional Point
- Majorana bound states from exceptional points in non-topological superconductors
- Non-Hermitian extensions of higher-order topological phases and their biorthogonal bulk-boundary correspondence
- Non-Bloch band theory of non-Hermitian Hamiltonians in the symplectic class
- Second-order topological non-Hermitian skin effects
- Perspective on topological states of non-Hermitian lattices
- Effects of non-Hermitian perturbations on Weyl Hamiltonians with arbitrary topological charges
- Non-Hermitian topology: a unifying framework for the Andreev versus Majorana states controversy
- Non-Hermitian second-order skin and topological modes
- Observation of topological transport quantization by dissipation in fast Thouless pumps
- Hybrid skin-topological modes without asymmetric couplings
- Imaging work and dissipation in the quantum Hall state in graphene
- Realization of Qi-Wu-Zhang model in spin-orbit-coupled ultracold fermions
- One-way transport in laser-illuminated bilayer graphene: A Floquet isolator
- Light-induced anomalous Hall effect in massless Dirac fermion systems and topological insulators with dissipation
- Non-Hermitian Chiral Skin Effect
- Hermitian Bulk -- Non-Hermitian Boundary Correspondence
- Photonic corner skin modes
- Bulk-Bulk Correspondence in Disordered Non-Hermitian Systems
- Nonreciprocal Charge and Spin Transport Induced by Non-Hermitian Skin Effect in Mesoscopic Heterojunctions
- Topology by Dissipation: Transport properties
- Crafting zero-bias one-way transport of charge and spin
- Universal platform of point-gap topological phases from topological materials
- Dissipative topological systems
- Modified Generalized-Brillouin-Zone Theory with On-site Disorders
- Influences of the dissipative topological edge state on quantized transport in MnBi2Te4
- Spectral analysis, chiral disorder and topological edge states manifestation in open non-Hermitian Su-Schrieffer-Heeger chains
- Non-Hermiticity stabilized Majorana zero modes in semiconductor-superconductor nanowires
- Building topological device through emerging robust helical surface states