Memory loss is contagious in open quantum systems
- URL: http://arxiv.org/abs/2402.16096v1
- Date: Sun, 25 Feb 2024 14:22:51 GMT
- Title: Memory loss is contagious in open quantum systems
- Authors: Anael Ben-Asher, Antonio I. Fern\'andez-Dom\'inguez and Johannes Feist
- Abstract summary: Memoryless (Markovian) system-bath interactions are of fundamental interest in physics.
We demonstrate that it can result from the system becoming lossy due to the Markovian interaction with a second bath.
We introduce a Bloch-Redfield-inspired approach that assumes a Markovian interaction due to the system losses.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Memoryless (Markovian) system-bath interactions are of fundamental interest
in physics. While typically the absence of memory originates from the
characteristics of the bath, here we demonstrate that it can result from the
system becoming lossy due to the Markovian interaction with a second bath. This
suggests that the property of Markovianity is ``contagious'', i.e., it can be
transferred from one bath to another through the system with which they both
interact. We introduce a Bloch-Redfield-inspired approach that assumes a
Markovian interaction due to the system losses and significantly improves the
description of the bath-driven population transfer in a lossy system coupled to
a non-Markovian bath. Furthermore, it indicates that such interactions are
well-described by an effective spectral density that takes into account the
broadening of the system's energy levels due to dissipation. Our findings
reduce the computational demand in the theoretical description of complex
system-bath setups and pave the way for further studies of counterintuitive
Markovian interactions.
Related papers
- Observation of Nonlinear Response and Onsager Regression in a Photon Bose-Einstein Condensate [34.82692226532414]
The quantum regression theorem states that the correlations of a system at two different times are governed by the same equations of motion as the temporal response of the average values.
Here we experimentally demonstrate that the two-time particle number correlations in a photon Bose-Einstein condensate inside a dye-filled microcavity exhibit the same dynamics as the response of the condensate to a sudden perturbation of the dye molecule bath.
This confirms the regression theorem for a quantum gas and, moreover, establishes a test of this relation in an unconventional form where the perturbation acts on the bath and only the condensate response is monitored.
arXiv Detail & Related papers (2024-03-07T17:59:58Z) - 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) - Non-classicality of squeezed non-Markovian processes [0.0]
We study nonclassical effects in the dynamics of an open quantum system.
The squeezed reservoirs coupled to the system through single and two quanta exchange processes are put in the spotlight.
arXiv Detail & Related papers (2023-05-16T09:56:53Z) - Interplay of decoherence and relaxation in a two-level system
interacting with an infinite-temperature reservoir [0.0]
We study the time evolution of a single qubit in contact with a bath.
We use the so-called modified Redfield theory which also treats energy conserving interactions non-perturbatively.
arXiv Detail & Related papers (2023-03-21T14:16:26Z) - Entanglement dynamics of coupled quantum oscillators in independent
nonMarkovian baths [0.0]
This work strives to better understand how the entanglement in an open quantum system is affected by a nonMarkovian environment (with memories)
A system with a short memory time can acquire improvement when it is coupled to another system with a long memory time, but, at a cost of the latter.
The sustainability of the bipartite entanglement is determined by the party which breaks off entanglement most easily.
arXiv Detail & Related papers (2022-11-14T05:30:17Z) - Unveiling the Markovian to non-Markovian transition with quantum
collision models [0.0]
We study the dynamics of a qubit system in contact with a thermal bath made up of few ancillas, in which system-ancilla and ancilla-ancilla interactions are considered.
Results clearly indicate that the information backflows decrease when new ancillas are added to the bath, which sheds light on the nature of the Markovian to non-Markovian transition.
arXiv Detail & Related papers (2022-10-21T14:07:41Z) - Bridging the gap between topological non-Hermitian physics and open
quantum systems [62.997667081978825]
We show how to detect a transition between different topological phases by measuring the response to local perturbations.
Our formalism is exemplified in a 1D Hatano-Nelson model, highlighting the difference between the bosonic and fermionic cases.
arXiv Detail & Related papers (2021-09-22T18:00:17Z) - Using the Environment to Understand non-Markovian Open Quantum Systems [0.0]
We show how to use system correlations, calculated by any method, to infer any correlation function of a Gaussian environment.
In order to obtain accurate bath dynamics, we exploit a numerically exact approach to simulating the system dynamics.
arXiv Detail & Related papers (2021-06-08T09:43:03Z) - Signatures of bath-induced quantum avalanches in a many-body--localized
system [47.187609203210705]
Quantum avalanches occur when the system is locally coupled to a small thermal inclusion that acts as a bath.
We realize an interface between a many-body--localized system and a thermal inclusion of variable size, and study its dynamics.
arXiv Detail & Related papers (2020-12-30T18:34:34Z) - Effect of inter-system coupling on heat transport in a microscopic
collision model [21.9802187221101]
We consider a bipartite system composed of two subsystems each coupled to its own thermal environment.
We mainly study whether the approximation (i.e., the inter-system interaction is ignored when modeling the system-environment coupling) is valid or not.
arXiv Detail & Related papers (2020-12-23T09:34:50Z) - Continuous and time-discrete non-Markovian system-reservoir
interactions: Dissipative coherent quantum feedback in Liouville space [62.997667081978825]
We investigate a quantum system simultaneously exposed to two structured reservoirs.
We employ a numerically exact quasi-2D tensor network combining both diagonal and off-diagonal system-reservoir interactions with a twofold memory for continuous and discrete retardation effects.
As a possible example, we study the non-Markovian interplay between discrete photonic feedback and structured acoustic phononovian modes, resulting in emerging inter-reservoir correlations and long-living population trapping within an initially-excited two-level system.
arXiv Detail & Related papers (2020-11-10T12:38:35Z)
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.