System-bath entanglement during Markovian relaxation of a fermionic impurity

• URL: http://arxiv.org/abs/2306.08626v2
• Date: Thu, 2 Nov 2023 16:26:17 GMT
• Title: System-bath entanglement during Markovian relaxation of a fermionic impurity
• Authors: Krzysztof Ptaszynski, Massimiliano Esposito
• Abstract summary: We show that transient entanglement can be observed even in the weak coupling regime. This entanglement vanishes for long times, but is preserved over timescales comparable to the relaxation time. We relate the presence of such transient entanglement to the unitary character of the system-bath dynamics underlying the reduced Markovian description.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the dynamics of entanglement between the system and the environment during thermalization of a noninteracting fermionic impurity coupled to a fermionic thermal bath. We show that transient entanglement can be observed even in the weak coupling regime, when the reduced dynamics and thermodynamics of the system can be well described by an effectively classical and Markovian master equation for the state populations. This entanglement vanishes for long times, but is preserved over timescales comparable to the relaxation time. Its magnitude depends only weakly on the system-environment coupling but instead strongly on the purity of the initial state of the system. We relate the presence of such transient entanglement to the unitary character of the system-bath dynamics underlying the reduced Markovian description.

Related papers

• Thermodynamic Roles of Quantum Environments: From Heat Baths to Work Reservoirs [49.1574468325115]
  Environments in quantum thermodynamics usually take the role of heat baths. We show that within the same model, the environment can take three different thermodynamic roles. The exact role of the environment is determined by the strength and structure of the coupling.
  arXiv  Detail & Related papers  (2024-08-01T15:39:06Z)
• A magnetic clock for a harmonic oscillator [89.99666725996975]
  We study how the quantum dynamics transforms into a classical-like behaviour when conditions related with macroscopicity are met by the clock alone. In the description of this emerging behaviour finds its place the classical notion of time, as well as that of phase-space and trajectories on it.
  arXiv  Detail & Related papers  (2023-10-20T09:55:51Z)
• Dissipative preparation of a Floquet topological insulator in an optical lattice via bath engineering [44.99833362998488]
  Floquet engineering is an important tool for realizing charge-neutral atoms in optical lattices. We show that a driven-dissipative system approximates a topological insulator.
  arXiv  Detail & Related papers  (2023-07-07T17:47:50Z)
• System-bath entanglement of noninteracting fermionic impurities: Equilibrium, transient, and steady-state regimes [0.0]
  We investigate entanglement between a single fermionic level and a fermionic bath in three distinct thermodynamic regimes. The threshold coupling strength, at which entanglement appears, is shown to strongly depend on the bath bandwidth. A steady-state entanglement is generated for arbitrarily weak system-bath couplings at a certain threshold voltage.
  arXiv  Detail & Related papers  (2023-06-16T08:20:55Z)
• Slow dynamics of a mobile impurity interacting with an Anderson insulator [0.0]
  We investigate dynamics of a single mobile impurity immersed in a bath of Anderson localized particles. Considering longer time scales, we show that the impurity spreads sub-diffusively and induces a gradual delocalization of the Anderson insulator.
  arXiv  Detail & Related papers  (2022-12-14T08:57:13Z)
• Prethermalization in periodically-driven nonreciprocal many-body spin systems [0.0]
  We analyze a new class of time-periodic nonreciprocal dynamics in interacting chaotic classical spin systems. We find that the magnetization dynamics features a long-lived metastable plateau, whose duration is controlled by the fourth power of the drive frequency. We extend the notion of prethermal dynamics, observed in the high-frequency limit of periodically-driven systems, to nonreciprocal systems.
  arXiv  Detail & Related papers  (2022-08-18T18:00:15Z)
• Fast Thermalization from the Eigenstate Thermalization Hypothesis [69.68937033275746]
  Eigenstate Thermalization Hypothesis (ETH) has played a major role in understanding thermodynamic phenomena in closed quantum systems. This paper establishes a rigorous link between ETH and fast thermalization to the global Gibbs state. Our results explain finite-time thermalization in chaotic open quantum systems.
  arXiv  Detail & Related papers  (2021-12-14T18:48:31Z)
• Harmonic oscillator kicked by spin measurements: a Floquet-like system without classical analogous [62.997667081978825]
  The impulsive driving is provided by stroboscopic measurements on an ancillary degree of freedom. The dynamics of this system is determined in closed analytical form. We observe regimes with crystalline and quasicrystalline structures in phase space, resonances, and evidences of chaotic behavior.
  arXiv  Detail & Related papers  (2021-11-23T20:25:57Z)
• Unveiling non-Markovian spacetime signalling in open quantum systems with long-range tensor network dynamics [0.0]
  We use a Matrix Product State representation of the quantum state of a system and its environment to keep track of the bath explicitly. We predict a non-Markovian dynamics where long-range couplings induce correlations into the environment. The environment dynamics can be naturally extracted from our method and shine a light on long time feedback effects that are responsible for the observed non-Markovian recurrences in the eigen-populations of the system.
  arXiv  Detail & Related papers  (2021-07-23T13:28:08Z)
• Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
  We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas. Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit. The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
  arXiv  Detail & Related papers  (2020-08-05T18:00:26Z)
• Reservoir engineering with localized dissipation: dynamics and pre-thermalization [0.0]
  We study the relaxation dynamics of bosonic lattice systems locally coupled to a single squeezed reservoir. This allows us to study the cross-over from perturbative relaxation to a slow, quantum-Zeno regime. We also find the possibility of regimes of accelerated relaxation due to a surprising impedance matching phenomena.
  arXiv  Detail & Related papers  (2020-01-15T16:24:44Z)

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.