Steady-State Coherences under Partial Collective non-Markovian Decoherence

• URL: http://arxiv.org/abs/2507.02557v1
• Date: Thu, 03 Jul 2025 12:05:38 GMT
• Title: Steady-State Coherences under Partial Collective non-Markovian Decoherence
• Authors: S. L. Wu, W. Ma, Zhao-Ming Wang, P. Brumer, Lian-Ao Wu,
• Abstract summary: We study the role of non-Markovian decoherence in quantum systems.<n>We find that steady-state coherence depends on the initial state under collective decoherence, but not under partial decoherence.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Steady-state coherence in open quantum systems is crucial for quantum technologies, yet its behavior is not fully understood due to the interplay between collective and individual decoherence. While collective decoherence is thought to induce steady-state coherence, experiments often fail to observe this because of individual decoherence. We study a system of two harmonic oscillators coupled to both individual and collective environments, introducing a tunable parameter to adjust the decoherence proportions. By analytically solving the exact dynamical equations, we find that steady-state coherence depends on the initial state under collective decoherence, but not under partial decoherence. Interestingly, non-Markovianity induces rich and complex steady-state coherence behaviors. Our results offer new insights into the role of non-Markovian decoherence in quantum systems and serve as a benchmark for evaluating approximate methods in modelling quantum processes.

Related papers

• Theory of the correlated quantum Zeno effect in a monitored qubit dimer [41.94295877935867]
  We show how the competition between two measurement processes give rise to two distinct Quantum Zeno (QZ) regimes.<n>We develop a theory based on a Gutzwiller ansatz for the wavefunction that is able to capture the structure of the Hilbert phase diagram.<n>We show how the two QZ regimes are intimately connected to the topology of the flow of the underlying non-Hermitian Hamiltonian governing the no-click evolution.
  arXiv  Detail & Related papers  (2025-03-28T19:44:48Z)
• Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping [0.0]
  Incoherent processes added to unitary dynamics are typically deemed detrimental since they are expected to diminish quantum features such as superposition and entanglement.<n>We show that the mere addition of incoherent hopping, which results in a statistical coupling between the bosonic modes, leads to steady states with robust quantum entanglement.
  arXiv  Detail & Related papers  (2025-01-16T19:00:02Z)
• Equilibrium and nonequilibrium steady states with the repeated interaction protocol: Relaxation dynamics and energetic cost [44.99833362998488]
  We study the dynamics of a qubit system interacting with thermalized bath-ancilla spins via a repeated interaction scheme.<n>Our key finding is that deterministic system-ancilla interactions do not typically result in the system thermalizing to the thermal state of the ancilla.
  arXiv  Detail & Related papers  (2025-01-09T17:35:36Z)
• Efficiency of Dynamical Decoupling for (Almost) Any Spin-Boson Model [44.99833362998488]
  We analytically study the dynamical decoupling of a two-level system coupled with a structured bosonic environment. We find sufficient conditions under which dynamical decoupling works for such systems. Our bounds reproduce the correct scaling in various relevant system parameters.
  arXiv  Detail & Related papers  (2024-09-24T04:58:28Z)
• Quantum correlations in the steady state of light-emitter ensembles from perturbation theory [0.0]
  In systems of light emitters subject to single-emitter or two-emitter driving, the steady state perturbed away from the U(1) limit exhibits spin squeezing. Our main result is that in systems of light emitters subject to single-emitter or two-emitter driving, the steady state perturbed away from the U(1) limit generically exhibits spin squeezing.
  arXiv  Detail & Related papers  (2024-02-26T18:50:30Z)
• Quasiparticles of Decoherence Processes in Open Quantum Many-Body Systems: Incoherentons [8.329456268842227]
  We find that hitherto unrecognized quasiparticles -- incoherentons -- describe a coherent-to-incoherent transition in eigenmodes of a Liouvillian superoperator. We demonstrate the existence of incoherentons in a lattice boson model subject to dephasing, and show that the quantum coherence gap closes when incoherentons are deconfined.
  arXiv  Detail & Related papers  (2022-11-28T01:35:49Z)
• Emergent quantum correlations and collective behavior in non-interacting quantum systems subject to stochastic resetting [0.0]
  We investigate the dynamics of a non-interacting spin system undergoing coherent oscillations in the presence of Rabi resetting. We show that resetting generally induces long-range quantum and classical correlations. In the thermodynamic limit, the spin system can feature collective behavior.
  arXiv  Detail & Related papers  (2022-02-25T12:22:19Z)
• Unpredictability and entanglement in open quantum systems [0.0]
  We show that unpredictability and quantum entanglement can coexist even in the long time limit. We show that the required many-body interactions for the cellular automaton embedding can be efficiently realized within a variational quantum simulator platform.
  arXiv  Detail & Related papers  (2021-06-14T18:00:12Z)
• Sensing quantum chaos through the non-unitary geometric phase [62.997667081978825]
  We propose a decoherent mechanism for sensing quantum chaos. The chaotic nature of a many-body quantum system is sensed by studying the implications that the system produces in the long-time dynamics of a probe coupled to it.
  arXiv  Detail & Related papers  (2021-04-13T17:24:08Z)
• Non-equilibrium stationary states of quantum non-Hermitian lattice models [68.8204255655161]
  We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner. We focus on the quantum steady states of such models for both fermionic and bosonic systems.
  arXiv  Detail & Related papers  (2021-03-02T18:56:44Z)
• Einselection from incompatible decoherence channels [62.997667081978825]
  We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators. We show that Fock states remain the most robust states to decoherence up to a critical coupling.
  arXiv  Detail & Related papers  (2020-01-29T14:15:19Z)

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.