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arXiv 1002.2773hep-thquant-ph
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电动力学中的亚经典场与极化

Sub-classical fields and polarization in electrodynamics

Mathieu Planat, Janos Polonyi

摘要:

在时空分辨率下引入了电磁场和电流的期望值,该期望值属于量子域。这使我们能够从量子电动力学的基础出发,研究经典电动力学的一些关键特征。一个是出现的辐射场的延迟解决方案的麦克斯韦方程,来自行动的原则。讨论的另一个问题是电荷系统极化率的系统推导。进一步,通过微扰计算闭合时间路径下电磁场的约化密度矩阵,建立了光子场的退相干和一致性.

英文摘要:

Expectation values of the electromagnetic field and the electric current are introduced at space-time resolution which belongs to the quantum domain. These allow us to approach some key features of classical electrodynamics from the underlying QED. One is the emergence of the radiation field in the retarded solution of the Maxwell equation, derived from an action principle. Another question discussed is the systematic derivation of the polarizability of a charge system. Furthermore, the decoherence and the consistency of the photon field is established by a perturbative calculation of the reduced density matrix for the electromagnetic field within the Closed Time Path formalism.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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