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.

Ciccarello, F., Giovannetti, V. (2012). Local-channel-induced rise of quantum correlations in continuous-variable systems. PHYSICAL REVIEW A, 85, 022108-1-022108-6 [10.1103/PhysRevA.85.022108].

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

CICCARELLO, Francesco;
2012-01-01

Abstract

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.
Ciccarello, F., Giovannetti, V. (2012). Local-channel-induced rise of quantum correlations in continuous-variable systems. PHYSICAL REVIEW A, 85, 022108-1-022108-6 [10.1103/PhysRevA.85.022108].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/64897
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