Quantum speed limit of open quantum system models using the Wigner function

• URL: http://arxiv.org/abs/2406.01741v1
• Date: Mon, 3 Jun 2024 19:03:26 GMT
• Title: Quantum speed limit of open quantum system models using the Wigner function
• Authors: Arti Gaharwar, Devvrat Tiwari, Subhashish Banerjee,
• Abstract summary: The quantum speed limit time of open system models is explored using the Wasserstein-1-distance and the Wigner function. An interesting interplay is observed between non-Markovian behavior, quantumness, and the quantum speed limit time.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum speed limit time of open system models is explored using the Wasserstein-1-distance and the Wigner function. Use is made of the phase covariant and a two-qubit model interacting with a squeezed thermal bath via position-dependent coupling. The dependence of the coupling on the position of the qubits allowed the study of the dynamics in the collective regime, which is conducive to speeding up the evolution. The use of the Wigner function naturally allows the study of the quantumness of the systems studied. An interesting interplay is observed between non-Markovian behavior, quantumness, and the quantum speed limit time. The presence of quantum correlations is seen to speed up the evolution.

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)
• Amplification of quantum transfer and quantum ratchet [56.47577824219207]
  We study a model of amplification of quantum transfer and making it directed which we call the quantum ratchet model. The ratchet effect is achieved in the quantum control model with dissipation and sink, where the Hamiltonian depends on vibrations in the energy difference synchronized with transitions between energy levels. Amplitude and frequency of the oscillating vibron together with the dephasing rate are the parameters of the quantum ratchet which determine its efficiency.
  arXiv  Detail & Related papers  (2023-12-31T14:04:43Z)
• Dephasing effects on quantum correlations and teleportation in presence of state dependent bath [0.0]
  We analyze the effect of state dependent bath on the quantum correlations and the fidelity of a single qubit teleportation. It is shown that due to the presence of initial system-bath correlations, the system maintains quantum correlations for long times.
  arXiv  Detail & Related papers  (2023-07-03T15:31:19Z)
• 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)
• Quantum Speed Limit for Time-Fractional Open Systems [4.501305807267217]
  The Quantum Speed Limit (QSL) time captures the shortest time required for a quantum system to evolve between two states. It is shown that the non-Markovian memory effects of the environment can accelerate the time-fractional quantum evolution. A method to manipulate the non-Markovian dissipative dynamics of a time-fractional open quantum system is presented.
  arXiv  Detail & Related papers  (2023-04-29T14:51:20Z)
• 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)
• Quantumness and speedup limit of a qubit under transition frequency modulation [0.0]
  We show the capability of a frequency-modulated qubit embedded in a leaky cavity to exhibit enhancement of its dynamical quantum features. We also find an evolution speedup of the qubit through proper manipulation of the modulation parameters of the driving field.
  arXiv  Detail & Related papers  (2022-06-14T20:20:57Z)
• Coherent quantum annealing in a programmable 2000-qubit Ising chain [1.2472275770062884]
  We show coherent evolution through a quantum phase transition in the paradigmatic setting of the 1D transverse-field Ising chain. Results are in quantitative agreement with analytical solutions to the closed-system quantum model. These experiments demonstrate that large-scale quantum annealers can be operated coherently.
  arXiv  Detail & Related papers  (2022-02-11T19:00:00Z)
• Probing quantum information propagation with out-of-time-ordered correlators [41.12790913835594]
  Small-scale quantum information processors hold the promise to efficiently emulate many-body quantum systems. Here, we demonstrate the measurement of out-of-time-ordered correlators (OTOCs) A central requirement for our experiments is the ability to coherently reverse time evolution.
  arXiv  Detail & Related papers  (2021-02-23T15:29:08Z)
• Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
  We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
  arXiv  Detail & Related papers  (2021-01-21T22:18:49Z)
• Experimental study of decoherence of the two-mode squeezed vacuum state via second harmonic generation [19.5474623165562]
  We report a novel scheme on the study of decoherence of a two-mode squeezed vacuum state via its second harmonic generation signal. Our scheme can directly extract the decoherence of the phase-sensitive quantum correlation $langle hatahatbrangle$ between two entangled modes. This is an experimental study on the decoherence effect of a squeezed vacuum state, which has been rarely investigated.
  arXiv  Detail & Related papers  (2020-12-22T05:38:24Z)

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.