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Tripartite quantum discord dynamics in qubits driven by the joint influence of distinct classical noises

Published: 01 January 2021 Publication History

Abstract

We investigate the dynamics of quantum discord in a system of three non-interacting qubits, initially entangled in a Greenberger–Horne–Zeilinger state, in the presence of mixed classical environments. Precisely, the joint impacts of a static noise (SN) and a random telegraphic noise (RTN) are probed, by combining them in two different ways: independent and bipartite system–environment coupling. For both cases, one marginal system is coupled with an environment (say E1), and the remaining subsystems are coupled either locally or not with a second environment (E2), and vice versa. We show that quantum discord is more fragile in independent environments than in bipartite ones no matter the Markovianity of the dynamical process, and may exhibit sudden death and revival phenomena. A static noise is more fatal to the survival of quantum discord than a RTN, and its shielding effects are more pronounced as the number of subsystems under its effects increases. The opposite is found for a RTN, where discord robustness is enhanced as the number of affected subsystems increases.

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Cited By

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  • (2021)Probing tripartite entanglement and coherence dynamics in pure and mixed independent classical environmentsQuantum Information Processing10.1007/s11128-021-03257-z20:10Online publication date: 27-Sep-2021
  • (2021)Quantum correlations of tripartite entangled states under Gaussian noiseQuantum Information Processing10.1007/s11128-021-03231-920:9Online publication date: 1-Sep-2021

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Published In

cover image Quantum Information Processing
Quantum Information Processing  Volume 20, Issue 1
Jan 2021
844 pages

Publisher

Kluwer Academic Publishers

United States

Publication History

Published: 01 January 2021
Accepted: 07 December 2020
Received: 27 July 2020

Author Tags

  1. Quantum discord
  2. Environmental noise
  3. Qubits

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  • (2021)Probing tripartite entanglement and coherence dynamics in pure and mixed independent classical environmentsQuantum Information Processing10.1007/s11128-021-03257-z20:10Online publication date: 27-Sep-2021
  • (2021)Quantum correlations of tripartite entangled states under Gaussian noiseQuantum Information Processing10.1007/s11128-021-03231-920:9Online publication date: 1-Sep-2021

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