Nonclassical correlations in non-Markovian continuous-variable systems
- Turku Center for Quantum Physics, Department of Physics and Astronomy, University of Turku, FIN-20014 Turun Yliopisto (Finland)
- ISI Foundation, I-10133 Turin (Italy)
- CNISM UdR Milano Universita, I-20133 Milan (Italy)
- Dipartimento di Fisica, Universita degli Studi di Milano, I-20133 Milan (Italy)
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.
- OSTI ID:
- 21440481
- Journal Information:
- Physical Review. A, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevA.82.012313; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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