Data di Pubblicazione:
2011
Citazione:
Fidelity matters : the birth of entanglement in the mixing of Gaussian states / S. Olivares, M. Paris. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 107:17(2011 Oct), pp. 170505.170505.1-170505.170505.4. [10.1103/PhysRevLett.107.170505]
Abstract:
We address the interaction of two Gaussian states through bilinear exchange Hamiltonians and analyze
the correlations exhibited by the resulting bipartite systems. We demonstrate that entanglement arises if
and only if the fidelity between the two input Gaussian states falls under a threshold value depending only
on their purities, first moments, and the strength of the coupling. Our result clarifies the role of quantum
fluctuations (squeezing) as a prerequisite for entanglement generation and provides a tool to optimize the
generation of entanglement in linear systems of interest for quantum technology.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
S. Olivares, M. Paris
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