Non-classical correlations in non-Markovian continuous variable systems

Details Non-classical correlations in non-Markovian continuous variable systems Non-classical correlations in non-Markovian continuous variable systems

2010-05-06

arxiv.org/abs/1005.1043v1

Phys. Rev. A 82, 012313 (2010)

Physics

Quantum Physics

10 pages, 5 figures

Scientific paper

We consider two identical and non-interacting harmonic oscillators coupled to either two independent bosonic baths or to a common bosonic bath. Under the only assumption of weak coupling, we analyze in details 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 sub shot noise intensity correlations remain absent.

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