Decoherence Resilience of the Non-Hermitian Skin Effect

• URL: http://arxiv.org/abs/2604.12739v1
• Date: Tue, 14 Apr 2026 13:53:51 GMT
• Title: Decoherence Resilience of the Non-Hermitian Skin Effect
• Abstract summary: We study the resilience of the non-Hermitian skin effect (NHSE) to decoherence.<n>NHSE survives up to the fully incoherent regime and is observed to even be enhanced by dephasing.<n>Our work opens avenues for harnessing decoherence to enhance directional transport in noisy, nonequilibrium systems.
• Score: 12.568876432021453
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Decoherence and dissipation, arising from unavoidable interactions with the environment, can exert a dual influence on transport in physical systems, suppressing coherent propagation while inducing diffusion and mitigating localization in disordered systems. Non-Hermitian physics reveals a qualitatively different scenario, in which structured dissipation can induce directional bulk-to-boundary transport, known as the non-Hermitian skin effect (NHSE), that remains robust against disorder. Whether such transport can persist, be enhanced or hindered under decoherence, remains a largely open question. Here we experimentally address this question using photonic quantum walks with two tunable prototypical decoherence channels, dephasing and amplitude damping. Under dephasing, the NHSE survives up to the fully incoherent regime and is observed to even be enhanced by dephasing, yielding drift velocities that exceed those of coherent dynamics. By contrast, amplitude damping shows a pronounced order dependence: applied before the non-Hermitian loss operator, it suppresses and ultimately eliminates the NHSE in the fully incoherent limit; applied afterward, the NHSE persists and can be enhanced at sufficiently large loss strengths. Our work bridges quantum and classical non-Hermitian dynamics, demonstrates the resilience of the NHSE to decoherence, and opens avenues for harnessing decoherence to enhance directional transport in noisy, nonequilibrium systems.

Related papers

• Topology from Decoherence [39.407739937584104]
  We show that decoherence can induce topological phenomena.<n>We demonstrate this in a lattice system subject to environment-induced dephasing.<n>Our results establish correlated quantum noise as a route to topology in open many-body systems.
  arXiv  Detail & Related papers  (2026-07-08T18:00:04Z)
• Noise-Induced Resurrection of Dynamical Skin Effects in Quasiperiodic Non-Hermitian Systems [0.0]
  We show that noise maps the non-Hermitian Schrdinger dynamics onto a non-reciprocal master equation.<n>This mechanism enables delocalization, reinstates directional transport, and revives the DSE even in regimes where the static NHSE is absent.<n>Our results uncover a noise-enabled mechanism for resurrecting the DSE and suggest a new route for controlling transport in quasiperiodic, open quantum systems.
  arXiv  Detail & Related papers  (2026-04-13T13:33:42Z)
• Light-Induced Quantum Self-Trapping of Vibrational Excitons in an Optical Cavity [0.0]
  In an optical cavity, strong light--matter coupling between excitons and photons is used to enhance energy delocalization.<n>In the absence of a cavity, the arising of true and complete QST -- textiti.e. -- is not possible due to the symmetry of the system.<n>We show that Coupling the system to a single-mode cavity strongly alters this behavior, with two emerging regimes.
  arXiv  Detail & Related papers  (2026-04-07T17:47:51Z)
• Observation of disorder-induced superfluidity [121.09589727417034]
  We explore phases arising from the interplay between disorder, kinetic energy, and interactions on a superconducting processor.<n>Our results provide strong experimental evidence for disorder-induced superfluidity.
  arXiv  Detail & Related papers  (2025-12-24T20:38:43Z)
• Generalised fractional Rabi problem [35.18016233072556]
  Fractional quantum dynamics provides a natural framework to capture nonlocal temporal behavior and memory effects in quantum systems.<n>In this work, we analyze the physical consequences of fractional-order quantum evolution using a Green's function formulation based on the Caputo fractional derivative.<n>We find that even in the absence of external driving, the static Hamiltonian term induces non-trivial spin dynamics with damping features directly linked to the fractional temporal nonlocality.
  arXiv  Detail & Related papers  (2025-10-09T12:51:57Z)
• Lifshitz-like Metastability and Optimal Dephasing in Dissipative Bosonic Lattices [0.0]
  We show that weak dephasing facilitates equilibration, while moderate to strong dephasing induces a pronounced slowdown of relaxation.<n>Our results uncover a counterintuitive mechanism by which dephasing, rather than promoting equilibration, can dynamically decouple specific modes from dissipation.
  arXiv  Detail & Related papers  (2025-08-13T04:28:50Z)
• Non-equilibrium dynamics of charged dual-unitary circuits [44.99833362998488]
  interplay between symmetries and entanglement in out-of-equilibrium quantum systems is currently at the centre of an intense multidisciplinary research effort. We show that one can introduce a class of solvable states, which extends that of generic dual unitary circuits. In contrast to the known class of solvable states, which relax to the infinite temperature state, these states relax to a family of non-trivial generalised Gibbs ensembles.
  arXiv  Detail & Related papers  (2024-07-31T17:57:14Z)
• Dynamical suppression of many-body non-Hermitian skin effect in Anyonic systems [3.072340427031969]
  The non-Hermitian skin effect (NHSE) is a fascinating phenomenon in nonequilibrium systems where eigenstates massively localize at the systems' boundaries. Our results open up a new avenue on exploring novel non-Hermitian phenomena from the interplay between NHSE and anyonic statistics.
  arXiv  Detail & Related papers  (2024-05-20T18:00:12Z)
• Frequency-resolved Purcell effect for the dissipative generation of steady-state entanglement [49.1574468325115]
  We report a driven-dissipative mechanism to generate stationary entangled $W$ states among strongly-interacting quantum emitters placed within a cavity. The non-harmonic energy structure of the interacting ensemble allows this transition to be resonantly selected by the cavity. Evidence of this purely dissipative mechanism should be observable in state-of-the-art cavity QED systems in the solid-state.
  arXiv  Detail & Related papers  (2023-12-19T18:04:22Z)
• Non-Hermitian skin effect and nonreciprocity induced by dissipative couplings [2.5378019600367723]
  We study the mechanism for realizing non-Hermitian skin effect (NHSE) via dissipative couplings. We find that when combined with the multichannel interference provided by a periodic dissipative-coherent coupling structure, the dissipative couplings can lead to unequal left-right couplings.
  arXiv  Detail & Related papers  (2023-11-07T08:33:16Z)
• Non-equilibrium quantum probing through linear response [41.94295877935867]
  We study the system's response to unitary perturbations, as well as non-unitary perturbations, affecting the properties of the environment. We show that linear response, combined with a quantum probing approach, can effectively provide valuable quantitative information about the perturbation and characteristics of the environment.
  arXiv  Detail & Related papers  (2023-06-14T13:31:23Z)
• Direction reversal of non-Hermitian skin effect via coherent coupling [0.0]
  Absolute negative mobility (ANM) in nonequilibrium systems depicts the possibility of particles propagating toward the opposite direction of an external force. We uncover in this work a phenomenon analogous to ANM regarding eigenstate localization and particle transport in non-Hermitian systems under the influence of the non-Hermitian skin effect (NHSE) A coherent coupling between two non-Hermitian chains individually possessing the same preferred direction of NHSE is shown to cause a direction reversal of NHSE for all eigenmodes.
  arXiv  Detail & Related papers  (2022-03-14T18:00:27Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.