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首页> 外文期刊>Jorunal of computational and theoretical transport >Derivation of a Transport Equation for Line Radiation Using the Wigner Phase Space Formalism
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Derivation of a Transport Equation for Line Radiation Using the Wigner Phase Space Formalism

机译:使用Wigner期间形式主义推导出线辐射的传输方程

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摘要

A transport equation for dipole radiation is derived from quantum electrodynamics. The radiation field is described in terms of a space-time Wigner function, which accounts for the position-momentum and time-energy Heisenberg uncertainty relations on an equal footing. The formalism involves the Heisenberg equations of motion for the quantized electric field and the polarization density. It is shown that the radiative transfer equation introduced phenomenologically in textbooks holds at the large spectral band limit, which is characteristic of a slowly varying radiation field in a medium with slowly varying emission and absorption coefficients.
机译:偶极辐射的传输方程来自量子电动力学。 辐射场根据时空Wigner函数描述,其考虑了位置动量和时间能量的Heisenberg在相等基础上的不确定性关系。 形式主义涉及对量化电场和偏振密度的Heisenberg运动方程。 结果表明,在教科书中引入的辐射传递方程在大谱带限制上,其在具有缓慢变化的发射和吸收系数的介质中的缓慢变化的辐射场的特征。

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