Cited by 20Quantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum optics and atomic interactions

Frozen Gaussian quantum discord in photonic crystal cavity array system

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Lü, Ying-Qi, An, Jun-Hong, Chen, Xi-Meng, Luo, Hong-Gang, Oh, C. H.·2013·Physical Review A

Abstract

Protecting quantum correlation from decoherence is one of the crucial issues in quantum information processing. It has been commonly recognized that any initial quantum correlation of a composite system diminishes asymptotically or abruptly to zero under local Markovian decoherence. Here we show that, contrary to this recognition, a noticeable Gaussian quantum discord of a continuous-variable bipartite system can be frozen in the steady state in the non-Markovian dynamics if each of the subsystems forms a localized mode with its local reservoir. The condition for this frozen quantum discord can be reached by appropriately engineering the structure of the reservoirs. The possible realization of our results in a coupled cavity array system formed by a photonic crystal is proposed.

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Crossref · 10.1103/physreva.88.012129

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  • Our mechanism is applicable to a dissipative harmonic oscillator, whose dynamics is governed by the same bound-state mechanism as our TLS, and the spin-boson model, where the bound state has been found playing a leading role in the quantum phase transition.

    “Our mechanism is applicable to a dissipative harmonic oscillator, whose dynamics is governed by the same bound-state mechanism as our TLS [45, 46], and the spinboson model, where the bound state has been found playing a leading role in the quantum phase transition of the model [39, 47].”

    From Mechanism for quantum speedup in open quantum systems (2016) · cites this paper as [45]

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Research works printed but not linked: 2

  1. [28]B. Aaronson, R. Lo Franco, and G. Adesso, Phys. Rev. A 88, 012120 (2013); R. Lo Franco, B. Bellomo, E. Andersson, and G. Compagno, ibid. 85, 032318 (2012).
  2. [51]M. C. Rechtsman, J. M. Zeuner, Y. Plotnik, Y. Lumer, D. Podolsky, F. Dreisow, S. Nolte, M. Segev, and A. Szameit, Nature (London) 496, 196 (2013).

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Authors
Lü, Y.-Q., An, J.-H., Chen, X.-M., Luo, H.-G., & Oh, C. H.
Affiliations
  • Lanzhou University (CN)
  • Centre for Quantum Technologies (SG)
Venue
Physical Review A
Published
2013-07-29
Volume
88
Issue
1
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
OpenAlex
W2011421848
Cited by
20
References
55
Citations by year
2024: 1 · 2022: 2 · 2021: 1 · 2020: 3 · 2019: 1 · 2017: 4 · 2016: 1 · 2015: 5 · 2014: 2
FWCI
2.94
Type
journal article
Language
en
Open access
Locations
  • Physical Review A (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Lanzhou University Institutional Repository (submittedVersion, cc-by-nc)
  • National University of Singapore (submittedVersion)
  • arXiv (Cornell University)
Funders
National Science Foundation
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
Keywords
quantum discord, non-Markovian dynamics, continuous-variable systems, localized modes, reservoir engineering, decoherence, steady state, bipartite quantum correlations

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