It was recently discovered that the quantum correlations of a pair of disentangled qubits, as measured by thequantum discord, can increase solely because of their interaction with a local dissipative bath. Here, we showthat a similar phenomenon can occur in continuous-variable bipartite systems.With this aim, we consider a classof two-mode squeezed thermal states and study the behavior of Gaussian quantum discord under various localMarkovian nonunitary channels. While these in general cause a monotonic drop of quantum correlations, aninitial rise can take place with a thermal-noise channel.
|Numero di pagine||6|
|Rivista||PHYSICAL REVIEW A|
|Stato di pubblicazione||Published - 2012|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics