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.
|Data di pubblicazione:||2012|
|Titolo:||Local-channel-induced rise of quantum correlations in continuous-variable systems|
|Citazione:||Ciccarello, F., & Giovannetti, V. (2012). Local-channel-induced rise of quantum correlations in continuous-variable systems. PHYSICAL REVIEW A, 85, 022108-1-022108-6.|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevA.85.022108|
|Appare nelle tipologie:||1.01 Articolo in rivista|