Engineering Non-Hermitian Skin Effect with Band Topology in Ultracold Gases

Abstract

Non-Hermitian skin effect(NHSE) describes a unique non-Hermitian phenomenon that all eigen-modes are localized near the boundary, and has profound impact on a wide range of bulk properties. In particular, topological systems with NHSE have stimulated extensive research interests recently, given the fresh theoretical and experimental challenges therein. Here we propose a readily implementable scheme for achieving NHSE with band topology in ultracold gases. Specifically, the scheme realizes the one-dimensional optical Raman lattice with two types of spin-orbit coupling (SOC) and an additional laser-induced dissipation. By tuning the dissipation and the SOC strengths, NHSE and band topology can be individually controlled such that they can coexist in a considerable parameter regime. To identify the topological phase in the presence of NHSE, we have restored the bulk-boundary correspondence by invoking the non-Bloch band theory, and discussed the dynamic signals for detection. Our work serves as a guideline for engineering topological lattices with NHSE in the highly tunable environment of cold atoms, paving the way for future studies of exotic non-Hermitian physics in a genuine quantum many-body setting.

9+4 pages, 5+6 figures

References in corpus (33)

• Non-Hermitian Physics
• Topological Origin of Non-Hermitian Skin Effects
• Correspondence between winding numbers and skin modes in non-hermitian systems
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Efficient Light Funneling based on the non-Hermitian Skin Effect
• Non-Hermitian bulk-boundary correspondence and auxiliary generalized Brillouin zone theory
• Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas
• Critical non-Hermitian Skin Effect
• Topological phase transition in non-Hermitian quasicrystals
• Probing non-Hermitian Skin Effect and non-Bloch Phase Transitions
• Higher-order non-Hermitian skin effect
• Observation of arbitrary topological windings of a non-Hermitian band
• Non-Hermitian skin modes induced by on-site dissipations and chiral tunneling effect
• Topology-Induced Spontaneous Non-reciprocal Pumping in Cold-Atom Systems with Loss
• Emergence of coherence in a uniform quasi-two-dimensional Bose gas
• Homogeneous Atomic Fermi Gases
• Exact solution of non-Hermitian systems with generalized boundary conditions: size-dependent boundary effect and fragility of skin effect
• Observation of non-Bloch parity-time symmetry and exceptional points
• Non-Bloch topological invariants in a non-Hermitian domain-wall system
• Non-Bloch band collapse and chiral Zener tunneling
• Manipulating Topological Edge Spins in One-Dimensional Optical Lattice
• Exact mobility edges, $\mathcal{P}\mathcal{T}$-symmetry breaking and skin effect in one-dimensional non-Hermitian quasicrystals
• Helical damping and anomalous critical non-Hermitian skin effect
• Nano-Scale `Dark State' Optical Potentials for Cold Atoms
• Designing Arbitrary One-dimensional Potentials on an Atom Chip
• Non-Bloch $\mathcal{P}\mathcal{T}$ symmetry breaking in non-Hermitian Photonic Quantum Walks
• Dislocation Non-Hermitian Skin Effect
• Detecting non-Bloch topological invariants in quantum dynamics
• Subwavelength-width optical tunnel junctions for ultracold atoms
• Boundary Condition Independence of Non-Hermitian Hamiltonian Dynamics
• Symmetry Indicators for Inversion-Symmetric Non-Hermitian Topological Band Structures
• Non-Bloch quench dynamics
• Information constraint in open quantum systems

Cited by in corpus (19)

• Topological Non-Hermitian skin effect
• Two-dimensional non-Hermitian skin effect in an ultracold Fermi gas
• Topological origin of non-Hermitian skin effect in higher dimensions and uniform spectra
• Proposal for Observing Yang-Lee Criticality in Rydberg Atomic Arrays
• Non-Hermitian skin effect in one-dimensional interacting Bose gas
• Occupation-dependent particle separation in one-dimensional non-Hermitian lattices
• Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling
• Non-Hermitian Skin Effect in Periodically-Driven Dissipative Ultracold Atoms
• Kinked linear response from non-Hermitian cold-atom pumping
• Geometry-dependent skin effect and anisotropic Bloch oscillations in a non-Hermitian optical lattice
• Topological Phases of Tight-Binding Trimer Lattice in the BDI Symmetry Class
• Non-Hermitian skin effect in a single trapped ion
• Dissipative two-dimensional Raman lattice
• Measuring Non-Hermitian Topological Invariants Directly from Quench Dynamics
• Anomalous spectrum in a non-Hermitian quasiperiodic chain
• Designing nontrivial one-dimensional Floquet topological phases using a spin-1/2 double-kicked rotor
• Collective dynamical Fermi suppression of optically-induced inelastic scattering
• Measuring topological invariants of even-dimensional line-gapped non-Hermitian systems through quench dynamics
• Exceptional flat bands in bipartite non-Hermitian lattices