Nonclassical correlations in non-Markovian continuous-variable systems

Ruggero Vasile, Paolo Giorda, Stefano Olivares, Matteo G. A Paris, Sabrina Maniscalco

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74 Citations (Scopus)
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Abstract

We consider two identical and noninteracting harmonic oscillators coupled to either two independent bosonic baths or to a common bosonic bath. Under the only assumption, weak coupling, we analyze in detail the non-Markovian short-time-scale evolution of intensity correlations, entanglement, and quantum discord for initial two-mode squeezed-thermal vacuum states. In the independent reservoirs case, we observe the detrimental effect of the environment for all these quantities and we establish a hierarchy for their robustness against the environmental noise. In the common reservoir case, for initial uncorrelated states, we find that only quantum discord can be created via interaction with the bath, while entanglement and subshot noise intensity correlations remain absent.
Original languageEnglish
Article number012313
Number of pages10
JournalPhysical Review A
Volume82
Issue number1
DOIs
Publication statusPublished - 14 Jul 2010

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