混合空间中的实时热光子-光子相互作用
Real-time thermal photon-photon interactions in the mixed space
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中文总结 AI 辅助
该研究在实时形式（RTF）下，于混合空间计算光子自能，推导热传播子，简化RTF计算并对比了相关电磁性质的结果。
中文摘要 AI 辅助
利用光子-光子相互作用的低能/有效拉格朗日量，在新基中由σ参数指定的任意路径下，采用实时形式（RTF）计算最低阶光子自能。对标量场的因果格林函数（无化学势）进行评估，以推导混合空间中的常规热传播子。结果表明，对称传播子不依赖σ参数。此外，利用光子自能计算混合空间中的介电张量、光速等电磁性质，这极大简化了RTF中的计算。研究了这些量的时间依赖性，并将所得结果与其他模型的结果进行了对比讨论。
英文摘要
Using the effective Lagrangian for the low-energy/temperature of photon-photon interaction and the lowest-order photon self-energy is calculated in the Real Time Formalism (RTF) for an arbitrary path specified by the $σ$-parameter within the new basis. The causal Green's functions (without chemical potential) for the scalar field are evaluated to derive the usual thermal propagators in the mixed space. It is shown that the symmetric propagator does not depend on $σ-$ parameter. Furthermore, the photon self-energy is used to calculate some electromagnetic properties, such as dielectric tensor and velocity of light from photon self-energy in the mixed space that greatly simplifies calculations in RTF. Their time dependence is investigated, and a comparison between our results and those obtained by other models is discussed.
