4.6 Article

Local-channel-induced rise of quantum correlations in continuous-variable systems

Journal

PHYSICAL REVIEW A
Volume 85, Issue 2, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.022108

Keywords

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Funding

  1. FIRB IDEAS [RBID08B3FM]
  2. FIRB IDEAS [RBID08B3FM]

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It was recently discovered that the quantum correlations of a pair of disentangled qubits, as measured by the quantum discord, can increase solely because of their interaction with a local dissipative bath. Here, we show that a similar phenomenon can occur in continuous-variable bipartite systems. With this aim, we consider a class of two-mode squeezed thermal states and study the behavior of Gaussian quantum discord under various local Markovian nonunitary channels. While these in general cause a monotonic drop of quantum correlations, an initial rise can take place with a thermal-noise channel.

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