涨落电动力学中能量和动量传递的格林函数形式
A Green's function formalism of energy and momentum transfer in fluctuational electrodynamics
摘要：
本文用电磁场的互谱密度描述了由于物体间温差引起的电磁场涨落引起的辐射能量和动量的传递。我们推导出热非平衡贡献的能量和动量转移和表面积分的切向分量的并矢格林函数的矢量亥姆霍兹方程之间的关系。这里导出的表达式适用于任意形状的物体，介电函数，以及磁导率。对于辐射转移的情况，我们导出了广义透射率和广义电导的表达式，它们在适当的范围内服从互易性，与黑体辐射转移理论一致。
英文摘要：
Radiative energy and momentum transfer due to fluctuations of electromagnetic fields arising due to temperature difference between objects is described in terms of the cross-spectral densities of the electromagnetic fields. We derive relations between thermal non-equilibrium contributions to energy and momentum transfer and surface integrals of tangential components of the dyadic Green's functions of the vector Helmholtz equation. The expressions derived here are applicable to objects of arbitrary shapes, dielectric functions, as well as magnetic permeabilities. For the case of radiative transfer, we derive expressions for the generalized transmissivity and generalized conductance that are shown to obey reciprocity and agree with theory of black body radiative transfer in the appropriate limit.
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