6533b82afe1ef96bd128c32f
RESEARCH PRODUCT
Local-channel-induced rise of quantum correlations in continuous-variable systems
Vittorio GiovannettiFrancesco Ciccarellosubject
PhysicsQuantum discordQuantum PhysicsQuantum dynamicsFOS: Physical sciencesQuantum capacityAtomic and Molecular Physics and OpticsClassical capacityOpen quantum systemQuantum mechanicsQuantum processQuantum operationdiscord cv systems quantum correlationsQuantum Physics (quant-ph)Amplitude damping channelENTANGLEMENTComputer Science::Databasesdescription
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. To this aim, we consider a class of two-mode squeezed thermal states and study the behavior of Gaussian quantum discord under various local Markovian non-unitary channels. While these in general cause a monotonic drop of quantum correlations, an initial rise can take place with a thermal-noise channel.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-02-07 |