QUANTUM THEORY OF OPTICAL COHERENCE
QUANTUM THEORY OF OPTICAL COHERENCE
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DOI：
10.1103/physrev.130.2529
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发表时间：
1963-01-01
期刊：
影响因子：
--
通讯作者：
GLAUBER, RJ
中科院分区：
文献类型：
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作者：
GLAUBER, RJ
传统上用于光学的相干性概念已不足以满足最近开放的实验领域的需要。为了提供一个更全面的讨论的相干性，一系列的相关函数的复杂的场强定义。n阶函数表示在空间和时间的2n个不同点处的场的值的相关性。这些函数的某些值可以通过光子的n倍延迟符合探测来测量。一个完全相干的场被定义为一个相关函数满足无限系列的规定条件。根据实际满足的相干条件的数量，区分了不完全相干的各种顺序。值得注意的是，历史上被描述为光学相干的场只有一阶相干性。另一方面，在量子理论和经典理论中，都证明了所有阶次相干的场原则上的存在。在这些讨论中使用的方法适用于任意时间依赖的领域。结果表明，相干性不需要单色性。相干场可以用任意的光谱产生。
The concept of coherence which has conventionally been used in optics is found to be inadequate to the needs of recently opened areas of experiment. To provide a fuller discussion of coherence, a succession of correlation functions for the complex field strengths is defined. The n th order function expresses the correlation of values of the fields at 2 n different points of space and time. Certain values of these functions are measurable by means of n-fold delayed coincidence detection of photons. A fully coherent field is defined as one whose correlation functions satisfy an infinite succession of stated conditions. Various orders of incomplete coherence are distinguished, according to the number of coherence conditions actually satisfied. It is noted that the fields historically described as coherent in optics have only first-order coherence. On the other hand, the existence, in principle, of fields coherent to all orders is shown both in quantum theory and classical theory. The methods used in these discussions apply to fields of arbitrary time dependence. It is shown, as a result, that coherence does not require monochromaticity. Coherent fields can be generated with arbitrary spectra.