Entanglement and nonlocality of one- and two-mode combination squeezed state

Details Entanglement and nonlocality of one- and two-mode combination squeezed state Entanglement and nonlocality of one- and two-mode combination squeezed state

2010-08-31

arxiv.org/abs/1008.5253v1

Physics

Quantum Physics

15 pages, 7 figures, accepted by Optics communications

Scientific paper

10.1016/j.optcom.2010.08.001

We investigate the entanglement and nonlocality properties of one- and two-mode combination squeezed vacuum state (OTCSS, with two-parameter lamda and gamma) by analyzing the logarithmic negativity and the Bell's inequality. It is found that this state exhibits larger entanglement than that of the usual two-mode squeezed vacuum state (TSVS), and that in a certain regime of lamda, the violation of Bell's inequality becomes more obvious, which indicates that the nonlocality of OTCSS can be stronger than that of TSVS. As an application of OTCSS, the quantum teleportaion is examined, which shows that there is a region spanned by lamda and gamma in which the fidelity of OTCSS channel is larger than that of TSVS.

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