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

Francesco Ciccarello, Francesco Ciccarello, Vittorio Giovannetti

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)022108-1-022108-6
Number of pages6
JournalPHYSICAL REVIEW A
Volume85
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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