Unified theory of ghost imaging with Gaussian-state light
Unified theory of ghost imaging with Gaussian-state light
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DOI：
10.1103/physreva.77.043809
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发表时间：
2008-04-01
影响因子：
2.9
通讯作者：
Shapiro, Jeffrey H.
中科院分区：
文献类型：
--
作者：
Erkmen, Baris I.;Shapiro, Jeffrey H.
重影成像理论是在高斯态框架中发展起来的，该框架既包含了热态和双光子态成像器的先前工作，又提供了对此类系统中经典行为和量子行为之间边界的完整理解。该分析的核心是使用一般高斯态源获得的光电流相关图像的推导表达式。该图像以两个检测场之间的相位不敏感和相位敏感互相关以及背景来表示。由于任何一对互相关都可以通过经典高斯态获得，因此图像本身不带有量子签名。然而，如果比较具有相同自相关函数的经典和非经典高斯态源的图像特征，则非经典源在其近场中提供分辨率改进，并在其远场中提供视场改进。
The theory of ghost imaging is developed in a Gaussian-state framework that both encompasses prior work-on thermal-state and biphoton-state imagers-and provides a complete understanding of the boundary between classical and quantum behavior in such systems. The core of this analysis is the expression derived for the photocurrent-correlation image obtained using a general Gaussian-state source. This image is expressed in terms of the phase-insensitive and phase-sensitive cross correlations between the two detected fields, plus a background. Because any pair of cross correlations is obtainable with classical Gaussian states, the image does not carry a quantum signature per se. However, if the image characteristics of classical and nonclassical Gaussian-state sources with identical autocorrelation functions are compared, the nonclassical source provides resolution improvement in its near field and field-of-view improvement in its far field.