Observation of exceptional points and skin effect correspondence in non-Hermitian phononic crystals

Abstract

Exceptional points and skin effect, as the two distinct hallmark features unique to the non-Hermitian physics, have each attracted enormous interests. Recent theoretical works reveal that the topologically nontrivial exceptional points can give rise to the non-Hermitian skin effect, which is geometry-dependent. However, this kind of novel correspondence between the exceptional points and skin effect remains to be confirmed by experiments. Here, we corroborate the correspondence in a non-Hermitian phononic crystal. The exceptional points connected by the bulk Fermi arcs, and the skin effects with the geometry dependence, are evidenced in simulations and experiments. Our work, building an experimental bridge between the exceptional points and skin effect and uncovering the unconventional geometry-dependent skin effect, expands a horizon in non-Hermitian physics.

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Cited by in corpus (40)

• Two-dimensional non-Hermitian skin effect in an ultracold Fermi gas
• Experimental Realization of Geometry-Dependent Skin Effect in a Reciprocal Two-Dimensional Lattice
• Experimental observation of non-Hermitian higher-order skin interface states in topological electric circuits
• A Non-Hermitian Moiré Valley Filter
• Erratic non-Hermitian skin localization
• Non-Hermitian butterfly spectra in a family of quasiperiodic lattices
• Exact analogue of the Hatano-Nelson model in 1D continuous nonreciprocal systems
• Edge theory of non-Hermitian skin modes in higher dimensions
• A brief review of hybrid skin-topological effect
• Universal scalefree non-Hermitian skin effect near the Bloch point
• Non-Hermitian Skin Effect in Periodically-Driven Dissipative Ultracold Atoms
• Hybrid scale-free skin effect in non-Hermitian systems: A transfer matrix approach
• Geometry-dependent skin effect and anisotropic Bloch oscillations in a non-Hermitian optical lattice
• Algebraic non-Hermitian skin effect and generalized Fermi surface formula in arbitrary dimensions
• Localization-Delocalization Transitions in Non-Hermitian Aharonov-Bohm Cages
• Tailoring Bound State Geometry in High-Dimensional Non-Hermitian Systems
• Universal spectral moment theorem and its applications in non-Hermitian systems
• Non-Hermitian Skin Effect Along Hyperbolic Geodesics
• General theory for infernal points in non-Hermitian systems
• Implementing non-Abelian Hatano-Nelson model in electric circuits
• Fate of pseudo mobility-edge and multiple states in non-Hermitian Wannier-Stark lattice
• Experimental probe of band structures of bilayer valley photonic crystals
• Topological Singularities in Metasurface Scattering Matrices: From Nodal Lines to Exceptional Lines
• Non-Bloch Dirac Points and Phase Diagram in the Stacked Non-Hermitian SSH Model
• Super-enhanced Sensitivity in Non-Hermitian Systems at Infernal Points
• Restoration of non-Hermitian bulk-boundary correspondence by counterbalancing skin effect
• Tentaclelike spectra and bound states in Hatano-Nelson chain with long-range impurity coupling
• Bulk-boundary correspondence in topological systems with the momentum dependent energy shift
• Creating high-dimensional topological physics using a single ring resonator
• Theory for the spectral splitting exponent of exceptional points
• Optical non-Hermitian skin effect in two-dimensional uniform media
• Hermitian and non-Hermitian topology in active matter
• Experimentally Probing Non-Hermitian Spectral Transition and Eigenstate Skewness
• Experimental observation of energy-band Riemann surface
• Machine learning topological energy braiding of non-Bloch bands
• Magnetic Control of the Non-Hermitian Skin Effect in Two-Dimensional Lattices
• Scaling of Quantum Geometry Near the Non-Hermitian Topological Phase Transitions
• Arbitrary Control of Non-Hermitian Skin Modes via Disorder and An Electric Field
• Quasiperiodic Skin Criticality in an Exactly Solvable Non-Hermitian Quasicrystal
• Algebraic States in Continuum in $d>1$ Dimensional Non-Hermitian Systems