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arXiv quant-ph/0407209quant-ph
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最佳小光束位移测量

Optimum Small Optical Beam Displacement Measurement

Magnus T. L. Hsu, Vincent Delaubert, Ping Koy Lam, Warwick Bowen

摘要:

我们推导出TEM 00模光束位移的量子噪声极限。使用多模态分析,我们表明,传统的分裂检测方案测量光束位移是非最佳的80%的效率。我们提出了一种新的位移测量方案,是最佳的小梁位移。该方案利用具有TEM 10模式本地振荡器的零差检测设置。我们表明,虽然量子噪声限制位移测量可以超过使用压缩光在适当的空间模式的两个计划,TEM 10零差计划优于分裂检测的所有值的压缩。

英文摘要:

We derive the quantum noise limit for the optical beam displacement of a TEM00 mode. Using a multimodal analysis, we show that the conventional split detection scheme for measuring beam displacement is non-optimal with 80% efficiency. We propose a new displacement measurement scheme that is optimal for small beam displacement. This scheme utilises a homodyne detection setup that has a TEM10 mode local oscillator. We show that although the quantum noise limit to displacement measurement can be surpassed using squeezed light in appropriate spatial modes for both schemes, the TEM10 homodyning scheme out-performs split detection for all values of squeezing.

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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