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arXiv 0711.3608quant-ph
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压缩态隐形传态和存储的量子基准

Quantum Benchmark for Teleportation and Storage of Squeezed States

Gerardo Adesso, Giulio Chiribella

摘要:

我们为零位移单模压缩态的隐形传态和存储提供了一个量子基准。对于纯压缩输入态,保真度高于81.5%,以获得优于任何经典的策略的基础上估计的未知压缩和压缩态的重新准备。对于压缩热输入态,我们得到了一个上、下界的经典平均保真度收紧适度的混合度。这些结果使最近的实验与压缩光的关键讨论。

英文摘要:

We provide a quantum benchmark for teleportation and storage of single-mode squeezed states with zero displacement and a completely unknown degree of squeezing along a given direction. For pure squeezed input states, a fidelity higher than 81.5% has to be attained in order to outperform any classical strategy based on an estimation of the unknown squeezing and repreparation of squeezed states. For squeezed thermal input states, we derive an upper and a lower bound on the classical average fidelity which tighten for moderate degree of mixedness. These results enable a critical discussion of recent experiments with squeezed light.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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