Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas

Abstract

Three-dimensional topological Weyl semimetals can generally support a zero-dimensional Weyl point characterized by a quantized Chern number or a one-dimensional Weyl nodal ring (or line) characterized by a quantized Berry phase in the momentum space. Here, in a dissipative system with particle gain and loss, we discover a new type of topological ring, dubbed Weyl exceptional ring consisting of exceptional points at which two eigenstates coalesce. Such a Weyl exceptional ring is characterized by both a quantized Chern number and a quantized Berry phase, which are defined via the Riemann surface. We propose an experimental scheme to realize and measure the Weyl exceptional ring in a dissipative cold atomic gas trapped in an optical lattice.

6 pages, 3 figures

References in corpus (9)

• The physics of exceptional points
• PT-symmetry breaking and laser-absorber modes in optical scattering systems
• Topological Semimetals
• Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
• Topology and Interactions in a Frustrated Slab: Tuning from Weyl Semimetals to C > 1 Fractional Chern Insulators
• Emergent Electromagnetic Induction and Adiabatic Charge Pumping in Weyl Semimetals
• Type-II Weyl Points in Three-Dimensional Cold Atom Optical Lattices
• Anisotropic invariance and the distribution of quantum correlations
• Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas

Cited by in corpus (43)

• Topological Origin of Non-Hermitian Skin Effects
• Periodic Table for Topological Bands with Non-Hermitian Bernard-LeClair Symmetries
• New topological invariants in non-Hermitian systems
• Flat Band in Disorder Driven Non-Hermitian Weyl Semimetals
• Many-body topology of non-Hermitian systems
• Topological Anderson insulators in two-dimensional non-Hermitian disordered systems
• Dislocation Non-Hermitian Skin Effect
• Finite-size effects in non-Hermitian topological systems
• Probing Complex-energy Topology via Non-Hermitian Absorption Spectroscopy in a Trapped Ion Simulator
• Fate of fractional quantum Hall states in open quantum systems: characterization of correlated topological states for the full Liouvillian
• Anisotropic exceptional points of arbitrary order
• Topological thermal transport
• Disorder-induced exceptional points and nodal lines in Dirac superconductors
• Topology and exceptional points of massive Dirac models with generic non-Hermitian perturbations
• Fate of zero modes in a finite Su-Schrieffer-Heeger Model with $\mathcal{P}\mathcal{T}$ Symmetry
• Non-Hermitian phase transition and eigenstate localization induced by asymmetric coupling
• Quantum-Squeezing-Induced Point-Gap Topology and Skin Effect
• R-DMFT study of a non-Hermitian skin effect for correlated systems: analysis based on a pseudo-spectrum
• Angle-Resolved Thermal Emission Spectroscopy Characterization of Non-Hermitian Meta-Crystals
• Generalized bulk-boundary correspondence in periodically driven non-Hermitian systems
• Wannier-type photonic higher-order topological corner states induced solely by gain and loss
• Double exceptional links in a three-dimensional dissipative cold atomic gas
• Non-Hermitian Weyl semimetal and its Floquet engineering
• Dissipation-induced topological transitions in continuous Weyl materials
• Exceptional Cones in 4D Parameter Space
• Probing phase transitions in non-Hermitian systems with Multiple Quantum Coherences
• Making topologically trivial non-Hermitian systems nontrivial via gauge fields
• Experimental quantum simulation of non-Hermitian dynamical topological states using stochastic Schrödinger equation
• Topological phases of commensurate or incommensurate non-Hermitian Su-Schrieffer-Heeger lattices
• Evolution of spectral topology in one-dimensional long-range nonreciprocal lattices
• Non-Hermitian and Zeno limit of quantum systems under rapid measurements
• Observation of Impurity-Induced Scale-Free Localization in a Disordered Non-Hermitian Electrical Circuit
• Correlations in non-Hermitian systems and Diagram techniques for the steady state
• Berry curvature inside parity-time-symmetry protected exceptional surface
• Non-Quantized Edge Channel Conductance and Zero Conductance Fluctuation in Non-Hermitian Chern Insulators
• Bulk--Boundary Correspondence and Boundary Zero Modes in a Non-Hermitian Kitaev Chain Model
• Phase Diagram of a Non-Hermitian Chern Insulator: Destabilization of Chiral Edge States and Bulk-Boundary Correspondence
• Band topology of pseudo-Hermitian phases through tensor Berry connections and quantum metric
• Unconventional Weyl exceptional contours in non-Hermitian photonic continua
• $\mathcal{P}\mathcal{T}$-Symmetry Enhanced Berezinskii-Kosterlitz-Thouless Superfluidity
• Non-Hermitian Higher-Order Weyl Semimetals
• Non-Hermitian Higher-Order Dirac Semimetals
• Supermetal-insulator transition in a non-Hermitian network model