Quantum memory assisted entropic uncertainty and entanglement dynamics: Two qubits coupled with local fields and Ornstein Uhlenbeck noise

• URL: http://arxiv.org/abs/2111.11312v2
• Date: Thu, 5 May 2022 07:57:42 GMT
• Title: Quantum memory assisted entropic uncertainty and entanglement dynamics: Two qubits coupled with local fields and Ornstein Uhlenbeck noise
• Authors: Atta Ur Rahman, Nour Zidan, S. M. Zangi, Hazrat Ali
• Abstract summary: 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.
• Score: 1.1470070927586016
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entropic uncertainty and entanglement are two distinct aspects of quantum mechanical procedures. To estimate entropic uncertainty relations, entropies are used: the greater the entropy bound, the less effective the quantum operations and entanglement are. In this regard, 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, namely, common qubit-noise and independent qubit-noise interactions. To include the noisy effects of the local external fields, a Gaussian Ornstein Uhlenbeck process is considered. We show that the rise in entropic uncertainty gives rise to the disentanglement in the two-qubit Werner type state and both are directly proportional. Depending on the parameters adjustment and the number of environments coupled, different classical environments have varying capacities to induce entropic uncertainty and disentanglement in quantum systems. The entanglement is shown to be vulnerable to current external fields; however, by employing the ideal parameter ranges we provided, prolonged entanglement retention while preventing entropic uncertainty growth can be achieved. Besides, we have also analyzed the intrinsic behavior of the classical fields towards two-qubit entanglement without any imperfection with respect to different parameters

Related papers

• Crossing exceptional points in non-Hermitian quantum systems [41.94295877935867]
  We reveal the behavior of two-photon quantum states in non-Hermitian systems across the exceptional point. We demonstrate a switching in the quantum interference of photons directly at the exceptional point.
  arXiv  Detail & Related papers  (2024-07-17T14:04:00Z)
• Emergent Anomalous Hydrodynamics at Infinite Temperature in a Long-Range XXZ Model [14.297989605089663]
  We find anomalous hydrodynamics in a spin-1/2 XXZ chain with power-law couplings. We quantify the degree of quantum chaos using the Kullback-Leibler divergence. This work offers another deep understanding of emergent anomalous transport phenomena in a wider range of non-integrable quantum many-body systems.
  arXiv  Detail & Related papers  (2024-03-26T17:50:04Z)
• Unifying uncertainties for rotor-like quantum systems [0.0]
  Quantification of complementarity between angular momentum and angular variable is essential for exploitation of this canonical pair in quantum metrology. Special attention will be payed to uncertainty products which are exactly or approximately minimised by von Mises states.
  arXiv  Detail & Related papers  (2024-03-04T21:44:49Z)
• Open quantum system in the indefinite environment [13.979213066536394]
  In this paper, we investigate the interference engineering of the open quantum system. The environment is made indefinite either through the use of an interferometer or the introduction of auxiliary qubits.
  arXiv  Detail & Related papers  (2023-07-13T07:52:48Z)
• Non-Abelian symmetry can increase entanglement entropy [62.997667081978825]
  We quantify the effects of charges' noncommutation on Page curves. We show analytically and numerically that the noncommuting-charge case has more entanglement.
  arXiv  Detail & Related papers  (2022-09-28T18:00:00Z)
• Coalescence of non-Markovian dissipation, quantum Zeno effect and non-Hermitian physics, in a simple realistic quantum system [0.0]
  We develop a theoretical framework in terms of the time-dependent Schrodinger equation of motion. The link between the peaked structure of the effective decay rate of the qubit that interacts indirectly with the environment, and the onset of the quantum Zeno effect is discussed in great detail. Our treatment and results have revealed an intricate interplay between non-Markovian dynamics, quantum Zeno effect and non-Hermitian physics.
  arXiv  Detail & Related papers  (2022-06-28T09:28:02Z)
• Characterization of the measurement uncertainty dynamics in an open system [6.417948558033516]
  Information entropy can perfectly describe this type of randomness in information theory, because entropy can measure the degree of chaos in a given quantum system. In this paper, we investigate the dynamical features of the von Neumann entropic uncertainty in the presence of quantum memory. We put forward some effective operation strategies to reduce the magnitude of the measurement uncertainty under the open systems.
  arXiv  Detail & Related papers  (2021-10-22T15:07:08Z)
• The origin of loose bound of the thermodynamic uncertainty relation in a dissipative two-level quantum system [0.0]
  thermodynamic uncertainty relations dictate the trade-off between dissipation and fluctuations of irreversible current. It has been noticed that the bound is less tight in open quantum processes. Our study offers a better understanding of how quantum nature affects the TUR bound.
  arXiv  Detail & Related papers  (2021-08-10T00:26:02Z)
• Non-equilibrium stationary states of quantum non-Hermitian lattice models [68.8204255655161]
  We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner. We focus on the quantum steady states of such models for both fermionic and bosonic systems.
  arXiv  Detail & Related papers  (2021-03-02T18:56:44Z)
• Entropic uncertainty lower bound for a two-qubit system coupled to a spin chain with Dzyaloshinskii-Moriya interaction [0.0]
  In quantum information theory, the uncertainty principle is formulated using the concept of entropy. We study the dynamics of entropic uncertainty bound for a two-qubit quantum system coupled to a spin chain with Dzyaloshinskii-Moriya interaction.
  arXiv  Detail & Related papers  (2020-06-24T15:10:32Z)
• Einselection from incompatible decoherence channels [62.997667081978825]
  We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators. We show that Fock states remain the most robust states to decoherence up to a critical coupling.
  arXiv  Detail & Related papers  (2020-01-29T14:15:19Z)

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.