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arXiv quant-ph/0108051quant-ph
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条件双模压缩真空隐形传态

Conditional two mode squeezed vacuum teleportation

P. T. Cochrane, T. C. Ralph, G. J. Milburn

摘要:

通过对Einstein-Podolsky-Rosen(EPR)压缩真空进行条件测量,我们发现,无论是位置差、动量和还是数差、相位和连续变量隐形传态方案,都可以提高隐形传态的效率.我们研究了标准态和条件态的相对能力,并表明通过条件化可以提高相干态从$\bar{F} = 2/3$边界以下到边界以上的隐形传态保真度。

英文摘要:

We show, by making conditional measurements on the Einstein-Podolsky-Rosen (EPR) squeezed vacuum, that one can improve the efficacy of teleportation for both the position difference, momentum sum and number difference, phase sum continuous variable teleportation protocols. We investigate the relative abilities of the standard and conditional EPR states, and show that by conditioning we can improve the fidelity of teleportation of coherent states from below to above the $\bar{F} = 2/3$ boundary.

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