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arXiv quant-ph/9904002quant-ph
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作为不可约资源的压缩

Squeezing as an irreducible resource

Samuel L. Braunstein

摘要:

我们表明,压缩是一个不可约的资源,保持不变的变换下的线性光学元件。特别是,我们给出了一个分解的任何光学电路的线性输入输出关系到一个线性多端口干涉仪,然后由一组独特的单模挤压,然后另一个多端口干涉仪。使用这种分解,我们推导出一个不去定理的叠加宏观不同的状态从单光子探测。此外,我们证明了几种随机产生偏振纠缠态的方案之间的等价性。最后,我们导出了正交相位振幅的理想量子非破坏耦合的最小量子光路。

英文摘要:

We show that squeezing is an irreducible resource which remains invariant under transformations by linear optical elements. In particular, we give a decomposition of any optical circuit with linear input-output relations into a linear multiport interferometer followed by a unique set of single mode squeezers and then another multiport interferometer. Using this decomposition we derive a no-go theorem for superpositions of macroscopically distinct states from single-photon detection. Further, we demonstrate the equivalence between several schemes for randomly creating polarization-entangled states. Finally, we derive minimal quantum optical circuits for ideal quantum non-demolition coupling of quadrature-phase amplitudes.

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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