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Title: Frozen Gaussian quantum discord in photonic crystal cavity array system
Authors: Lü, Y.-Q.
An, J.-H. 
Chen, X.-M.
Luo, H.-G.
Oh, C.H. 
Issue Date: 29-Jul-2013
Citation: Lü, Y.-Q., An, J.-H., Chen, X.-M., Luo, H.-G., Oh, C.H. (2013-07-29). Frozen Gaussian quantum discord in photonic crystal cavity array system. Physical Review A - Atomic, Molecular, and Optical Physics 88 (1) : -. ScholarBank@NUS Repository.
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. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.88.012129
Appears in Collections:Staff Publications

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