Related papers: Quantum dynamical speedup for correlated initial states

Quantum dynamical speedup for correlated initial states

URL: http://arxiv.org/abs/2302.09364v1
Date: Sat, 18 Feb 2023 15:37:53 GMT
Title: Quantum dynamical speedup for correlated initial states
Authors: Alireza Gholizadeh, Maryam Hadipour, Soroush Haseli, Saeed Haddadi, and Hazhir Dolatkhah
Abstract summary: We consider a model in which the system has a correlation with the environment. The influence of the initial correlation between the system and environment on the quantum speed limit is investigated.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The maximal evolution speed of any quantum system can be expressed by the quantum speed limit time. In this paper, we consider a model in which the system has a correlation with the environment. The influence of the initial correlation between the system and environment on the quantum speed limit is investigated. It is shown that the appearance of non-Markovianity effects causes the speedup of quantum evolution. Moreover, we demonstrate the dependence of quantum dynamical speedup on the quantum coherence of the correlated initial state.

Related papers

Quantum highway: Observation of minimal and maximal speed limits for few and many-body states [19.181412608418608]
Inspired by the energy-time uncertainty principle, bounds have been demonstrated on the maximal speed at which a quantum state can change. We show that one can test the known quantum speed limits and that modifying a single Hamiltonian parameter allows the observation of the crossover of the different bounds on the dynamics.
arXiv Detail & Related papers (2024-08-21T18:00:07Z)
Quantum speed limit of Jaynes-Cummings model with detuning for arbitrary initial states [0.0]
The quantum speed limit (QSL) of the Jaynes-Cummings model with detuning for arbitrary initial states is investigated. It is found that even in the Markovian regime, increasing the detuning parameter leads to quantum speedup.
arXiv Detail & Related papers (2023-02-07T11:02:01Z)
Universality of critical dynamics with finite entanglement [68.8204255655161]
We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement. Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
arXiv Detail & Related papers (2023-01-23T19:23:54Z)
Entanglement-assisted quantum speedup: Beating local quantum speed limits [0.0]
Research in quantum information science aims to surpass the scaling limitations of classical information processing. Speed limits in interacting quantum systems are derived by comparing the rates of change in actual quantum dynamics. Proposed speed limits provide a tight bound on quantum speed advantage, including a quantum gain that can scale exponentially with the system's size.
arXiv Detail & Related papers (2022-11-27T17:38:57Z)
Correlations and energy in mediated dynamics [50.220421906597416]
We study the time required to maximally entangle two principal systems interacting under the same energy constraints. Direct interactions are proved to provide the fastest way to entangle the principal systems, but it turns out that there exist mediated dynamics that are just as fast. The final message is that correlations save energy: one has to supply extra energy if maximal entanglement across the principal systems is to be obtained as fast as with an initially correlated mediator.
arXiv Detail & Related papers (2022-08-30T14:49:08Z)
Speed limits on correlations in bipartite quantum systems [1.3854111346209868]
We derive speed limits on correlations such as entanglement, Bell-CHSH correlation, and quantum mutual information of quantum systems evolving under dynamical processes. Some of the speed limits we derived are actually attainable and hence these bounds can be considered to be tight.
arXiv Detail & Related papers (2022-07-12T16:23:28Z)
Demonstrating Quantum Microscopic Reversibility Using Coherent States of Light [58.8645797643406]
We propose and experimentally test a quantum generalization of the microscopic reversibility when a quantum system interacts with a heat bath. We verify that the quantum modification for the principle of microscopic reversibility is critical in the low-temperature limit.
arXiv Detail & Related papers (2022-05-26T00:25:29Z)
Quantum speed limit for the creation and decay of quantum correlations [0.0]
We derive Margolus-Levitin and Mandelstamm-Tamm type bound on the quantum speed limit time for the creation and decay of quantum correlations. We consider entanglement and quantum discord measures of quantum correlations, quantified using the Bures distance-based measure.
arXiv Detail & Related papers (2022-05-24T08:00:40Z)
Out-of-time-order correlator in the quantum Rabi model [62.997667081978825]
We show that out-of-time-order correlator derived from the Loschmidt echo signal quickly saturates in the normal phase. We show that the effective time-averaged dimension of the quantum Rabi system can be large compared to the spin system size.
arXiv Detail & Related papers (2022-01-17T10:56:57Z)
Simulation of Collective Neutrino Oscillations on a Quantum Computer [117.44028458220427]
We present the first simulation of a small system of interacting neutrinos using current generation quantum devices. We introduce a strategy to overcome limitations in the natural connectivity of the qubits and use it to track the evolution of entanglement in real-time.
arXiv Detail & Related papers (2021-02-24T20:51:25Z)
Quantum time dilation: A new test of relativistic quantum theory [91.3755431537592]
A novel quantum time dilation effect is shown to arise when a clock moves in a quantum superposition of two relativistic velocities. This effect is argued to be measurable using existing atomic interferometry techniques, potentially offering a new test of relativistic quantum theory.
arXiv Detail & Related papers (2020-04-22T19:26:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.