有界介质中非平衡光子格林函数的一个精确性质
An exact property of the nonequilibrium photon Green function for bounded media
摘要：
从Dyson方程出发，分析了真空中有界介质的非平衡光子格林函数。作为其组成部分，场-场涨落以及谱函数分裂成与介质和真空有关的部分。特别是，它表明，真空引起的波动描述的任意，甚至非经典光的经典波传播问题的解决方案方面的传播。结果概括了先前获得的稳定激发介质中的平板几何形状。
英文摘要：
The nonequilibrium photon Green function for a bounded medium surrounded by vacuum is analyzed on the basis of the Dyson equation. As its components, the field-field fluctuations as well as the spectral function split up into parts related to medium and vacuum. Particularly, it is shown that the vacuum-induced fluctuations describe propagation of arbitrary, even nonclassical light in terms of solutions of the classical wave propagation problem. The results generalize previously obtained ones for steadily excited media in slab geometry.
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