On some unexplored decoherence aspects in the Caldeira-Leggett formalism: arrival time distributions, identical particles and diffraction in time

• URL: http://arxiv.org/abs/2201.03778v1
• Date: Tue, 11 Jan 2022 04:49:26 GMT
• Title: On some unexplored decoherence aspects in the Caldeira-Leggett formalism: arrival time distributions, identical particles and diffraction in time
• Authors: S. V. Mousavi and S. Miret-Artes
• Abstract summary: The decoherence process is controlled by the two environment parameters, the relaxation rate or friction and the temperature. We show that the presence of a constant force field does not affect the decoherence. The symmetry of the wave function for identical particles plays no role when open dynamics are considered.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Some unexplored decoherence aspects within the Caldeira-Leggett master equation are analyzed and discussed. The decoherence process is controlled by the two environment parameters, the relaxation rate or friction and the temperature, leading to a gradual transition from the quantum to classical regime. Arrival time distributions, nonminimum-uncertainty-product or stretching Gaussian wave packets, identical particles and diffraction in time display interesting features during the decoherence process undergone by the time dependent interference patterns. We show that the presence of a constant force field does not affect the decoherence, {\it positive} values of the stretching parameter reduces the rate of decoherence, the symmetry of the wave function for identical particles plays no role when open dynamics are considered; and diffraction in time and space is gradually washed out by increasing the temperature and/or relaxation rate in the zero dissipation limit within the so-called quantum shutter problem.

Related papers

• Divergence of thermalization rates driven by the competition between finite temperature and quantum coherence [10.256367888517563]
  We observe a divergence of thermalization rates of quantum matters when the temperature approaches zero. We find that the quantum coherence and bosonic stimulation of superfluid induces the divergence while the finite temperature and the many-body interactions are suppressing the divergence.
  arXiv  Detail & Related papers  (2024-10-30T02:10:29Z)
• Wigner time delay and Hartman effect in quantum motion along deformed Riemannian manifolds [0.0]
  Elastic scattering of a wave can be quantified by a shift in the phase with respect to the incoming wave phase. At moderate and high energies, however, classical and quantum time delays coincide.
  arXiv  Detail & Related papers  (2024-02-07T10:39:39Z)
• Quantum Effects on the Synchronization Dynamics of the Kuramoto Model [62.997667081978825]
  We show that quantum fluctuations hinder the emergence of synchronization, albeit not entirely suppressing it. We derive an analytical expression for the critical coupling, highlighting its dependence on the model parameters.
  arXiv  Detail & Related papers  (2023-06-16T16:41:16Z)
• Indication of critical scaling in time during the relaxation of an open quantum system [34.82692226532414]
  Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields. Near continuous phase transitions, associated with the divergence of a correlation length, universal power-law scaling behavior with critical exponents independent of microscopic system details is found.
  arXiv  Detail & Related papers  (2022-08-10T05:59:14Z)
• In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator [68.8204255655161]
  Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. We investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator.
  arXiv  Detail & Related papers  (2022-05-19T13:28:47Z)
• On Statistical Distribution for Adiabatically Isolated Body [62.997667081978825]
  The statistical distribution for the case of an adiabatically isolated body was obtained in the framework of covariant quantum theory. The energy of an isolated system is an external parameter for the modified distribution instead of temperature.
  arXiv  Detail & Related papers  (2022-05-15T09:33:36Z)
• Clean two-dimensional Floquet time-crystal [68.8204255655161]
  We consider the two-dimensional quantum Ising model, in absence of disorder, subject to periodic imperfect global spin flips. We show by a combination of exact diagonalization and tensor-network methods that the system can sustain a spontaneously broken discrete time-translation symmetry. We observe a non-perturbative change in the decay rate of the order parameter, which is related to the long-lived stability of the magnetic domains in 2D.
  arXiv  Detail & Related papers  (2022-05-10T13:04:43Z)
• Quantum memory assisted entropic uncertainty and entanglement dynamics: Two qubits coupled with local fields and Ornstein Uhlenbeck noise [1.1470070927586016]
  We analyze the entropic uncertainty, entropic uncertainty lower bound, and concurrence dynamics in two non-interacting qubits. The exposure of two qubits is studied in two different qubit-noise configurations. We show that the rise in entropic uncertainty gives rise to the disentanglement in the two-qubit Werner type state.
  arXiv  Detail & Related papers  (2021-11-22T16:13:04Z)
• Momentum-space decoherence of distinguishable and identical particles in the Caldeira-Leggett formalism [0.0]
  We study momentum-space decoherence using minimum and non-uncertainty-product wave packets in the framework of Caldeira-Leggett formalism. For the cat state, while the stretching parameter speeds up the decoherence, the external linear potential strength does not affect the decoherence time. The interference pattern is not observed for minimum-uncertainty-product-Gaussian wave packets in the momentum space.
  arXiv  Detail & Related papers  (2021-11-04T19:50:58Z)
• 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)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.