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arXiv 1402.0976quant-ph
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关于在连续变量系统中使用保真度

About the use of fidelity in continuous variable systems

Antonio Mandarino, Matteo Bina, Stefano Olivares, Matteo G. A. Paris

摘要:

我们提出的例子连续变量(CV)状态具有高保真度的一个给定的目标,说$F > 0.9$或$F > 0.99$,仍然显示出显着的差异,在他们的物理性质,包括经典和量子态内的集合,可分离和纠缠的,或近高斯和强非高斯的。我们还表明,这种现象仍然存在时,施加额外的约束的能量或压缩分数的状态,从而普遍质疑使用保真度来评估CV系统的性能。

英文摘要:

We present examples of continuous variable (CV) states having high fidelity to a given target, say $F > 0.9$ or $F > 0.99$, and still showing striking differences in their physical properties, including classical and quantum states within the set, separable and entangled ones, or nearly Gaussian and strongly non-Gaussian ones. We also show that the phenomenon persists also when one imposes additional constraints on the energy or the squeezing fraction of the states, thus generally questioning the use of fidelity to assess properties of CV systems.

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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