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

[摘要] We investigate the entanglement and nonlocality properties of one- and two-mode combination squeezed vacuum state (OTCSS with two-parameter lambda 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 lambda 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 teleportation is examined which shows that there is a region spanned by lambda and gamma in which the fidelity of OTCSS channel is larger than that of TSVS (C) 2010 Elsevier BV All rights reserved

[发布日期] 2010-12-15

[关键词] Entanglement;Nonlocality;IWOP technique;Teleportation