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arXiv 1105.2805quant-ph
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相干和压缩真空光干涉:宇称探测达到海森堡极限

Coherent and Squeezed Vacuum Light Interferometry: Parity detection hits the Heisenberg limit

Kaushik P. Seshadreesan, Petr M. Anisimov, Hwang Lee, Jonathan P. Dowling

摘要:

相干光与压缩真空光的干涉可以产生高相干度的路径纠缠态。我们表明,相位灵敏度的上述干涉计划与奇偶检测饱和的量子克拉美-拉奥界,达到海森堡极限时,相干和压缩真空光混合在大致相等的比例。对于相同的干涉计划,我们绘制奇偶校验检测和小野和霍夫曼提出的基于对数导数的检测方案之间的详细比较。

英文摘要:

The interference between coherent and squeezed vacuum light can produce path entangled states with very high fidelities. We show that the phase sensitivity of the above interferometric scheme with parity detection saturates the quantum Cramer-Rao bound, which reaches the Heisenberg-limit when the coherent and squeezed vacuum light are mixed in roughly equal proportions. For the same interferometric scheme, we draw a detailed comparison between parity detection and a symmetric-logarithmic-derivative-based detection scheme suggested by Ono and Hofmann.

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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