Memory effects in multipartite systems coupled by non-diagonal dephasing mechanisms

• URL: http://arxiv.org/abs/2209.00400v1
• Date: Thu, 1 Sep 2022 12:23:46 GMT
• Title: Memory effects in multipartite systems coupled by non-diagonal dephasing mechanisms
• Authors: Adri\'an A. Budini
• Abstract summary: Non-Markovian memory effects can be characterized in an exact analytical way. Dissipative-entanglement-generation in this kind of dynamics can only emerge when a time-reversal symmetry is broken. It is also found that departures from Markovianity can equivalently be represented through a statistical mixture of Markovian dephasing dynamics.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The developing of (non-Markovian) memory effects strongly depends on the underlying system-environment dynamics. Here we study this problem in multipartite arrangements where all subsystems are coupled to each other by non-diagonal Markovian (Lindblad) dephasing mechanisms. Taking as system and environment arbitrary sets of complementary subsystems it is shown that both operational and non-operational approaches to quantum non-Markovianity can be characterized in an exact analytical way. Similarly to previous studies about dissipative-entanglement-generation in this kind of dynamics [Seif, Wang, and Clerk, Phys. Rev. Lett. 128, 070402 (2022)], we found that memory effects can only emerge when a time-reversal symmetry is broken. Nevertheless, it is also found that departures from Markovianity can equivalently be represented through a statistical mixture of Markovian dephasing dynamics, which does not involve any system-environment entanglement. Specific bipartite and multipartite dynamics exemplify the main general results.

Related papers

• System Symmetry and the Classification of Out-of-Time-Ordered Correlator Dynamics in Quantum Chaos [1.534667887016089]
  We study the universality of out-of-time-ordered correlator (OTOC) dynamics in quantum chaotic systems. We show that ensemble-averaged OTOC dynamics exhibit distinct universal behaviors depending on system symmetry.
  arXiv  Detail & Related papers  (2024-10-07T03:03:09Z)
• Entanglement of Disjoint Intervals in Dual-Unitary Circuits: Exact Results [49.1574468325115]
  The growth of the entanglement between a disjoint subsystem and its complement after a quantum quench is regarded as a dynamical chaos indicator. We show that for almost all dual unitary circuits the entanglement dynamics agrees with what is expected for chaotic systems. Despite having many conserved charges, charge-conserving dual-unitary circuits are in general not Yang-Baxter integrable.
  arXiv  Detail & Related papers  (2024-08-29T17:45:27Z)
• Geometric signature of non-Markovian dynamics [3.250902508512017]
  Non-Markovian effects of an open system dynamics are characterized by non-monotonic information flows. We show that the geometric decoherence of the open quantum system of interest can serve as a reliable witness of non-Markovian dynamics.
  arXiv  Detail & Related papers  (2023-12-20T20:51:10Z)
• Exact solutions of interacting dissipative systems via weak symmetries [77.34726150561087]
  We analytically diagonalize the Liouvillian of a class Markovian dissipative systems with arbitrary strong interactions or nonlinearity. This enables an exact description of the full dynamics and dissipative spectrum. Our method is applicable to a variety of other systems, and could provide a powerful new tool for the study of complex driven-dissipative quantum systems.
  arXiv  Detail & Related papers  (2021-09-27T17:45:42Z)
• Quantum non-Markovian "casual bystander" environments [0.0]
  Quantum memory effects can be induced even when the degrees of freedom associated to the environment are not affected at all during the system evolution. General properties of the resulting dynamics are studied with focus on the system-environment correlations, a collisional measurement-based representation, and the quantum regression hypothesis.
  arXiv  Detail & Related papers  (2021-09-20T14:24:18Z)
• 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)
• Detection of Bidirectional System-Environment Information Exchanges [0.0]
  Quantum memory effects can be related to a bidirectional exchange of information between an open system and its environment. Non-Markovianity can also be induced by environments whose dynamics is not affected during the system evolution.
  arXiv  Detail & Related papers  (2021-01-25T18:47:50Z)
• Distinguishing environment-induced non-Markovianity from subsystem dynamics [0.0]
  Quantum non-Markovianity modifies the environmental decoherence of a system. We consider the problem of distinguishing the multiple sources of non-Markovianity using a simple power spectrum technique.
  arXiv  Detail & Related papers  (2020-11-07T17:39:23Z)
• Quantum Non-equilibrium Many-Body Spin-Photon Systems [91.3755431537592]
  dissertation concerns the quantum dynamics of strongly-correlated quantum systems in out-of-equilibrium states. Our main results can be summarized in three parts: Signature of Critical Dynamics, Driven Dicke Model as a Test-bed of Ultra-Strong Coupling, and Beyond the Kibble-Zurek Mechanism.
  arXiv  Detail & Related papers  (2020-07-23T19:05:56Z)
• On dissipative symplectic integration with applications to gradient-based optimization [77.34726150561087]
  We propose a geometric framework in which discretizations can be realized systematically. We show that a generalization of symplectic to nonconservative and in particular dissipative Hamiltonian systems is able to preserve rates of convergence up to a controlled error.
  arXiv  Detail & Related papers  (2020-04-15T00:36:49Z)
• Distributing entanglement with separable states: assessment of encoding and decoding imperfections [55.41644538483948]
  Entanglement can be distributed using a carrier which is always separable from the rest of the systems involved. We consider the effect of incoherent dynamics acting alongside imperfect unitary interactions. We show that entanglement gain is possible even with substantial unitary errors.
  arXiv  Detail & Related papers  (2020-02-11T15:25:19Z)

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.