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arXiv 0809.4167quant-ph
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高斯态鬼像的信噪比

Signal-to-noise ratio of Gaussian-state ghost imaging

Baris I. Erkmen, Jeffrey H. Shapiro

摘要:

推导了三种高斯态鬼像结构的信噪比(SNR),它们由光源的性质区分开来。两个使用经典状态光,特别是联合信号参考场状态,其具有与具有适当的$P$表示一致的最大相位不敏感或最大相位敏感互相关。第三种方法使用非经典光,特别是一种具有量子力学所允许的最大相敏互相关的纠缠信号参考场态。分析SNR表达式开发的近场和远场制度,其中简单的渐近近似低亮度和高亮度源。当两个系统的所有其他系统参数相等时,高亮度热态(经典相位不敏感态)源通常将实现比双光子态(低亮度、纠缠态的低通量限制)源更高的SNR。利用高效率光子数分辨检测器,低亮度、高通量纠缠态源可以实现比利用高亮度热态源获得的SNR更高的SNR。

英文摘要:

The signal-to-noise ratios (SNRs) of three Gaussian-state ghost imaging configurations--distinguished by the nature of their light sources--are derived. Two use classical-state light, specifically a joint signal-reference field state that has either the maximum phase-insensitive or the maximum phase-sensitive cross correlation consistent with having a proper $P$ representation. The third uses nonclassical light, in particular an entangled signal-reference field state with the maximum phase-sensitive cross correlation permitted by quantum mechanics. Analytic SNR expressions are developed for the near-field and far-field regimes, within which simple asymptotic approximations are presented for low-brightness and high-brightness sources. A high-brightness thermal-state (classical phase-insensitive state) source will typically achieve a higher SNR than a biphoton-state (low-brightness, low-flux limit of the entangled-state) source, when all other system parameters are equal for the two systems. With high efficiency photon-number resolving detectors, a low-brightness, high-flux entangled-state source may achieve a higher SNR than that obtained with a high-brightness thermal-state source.

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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