阻尼对手征各向同性介质中电光效应消失的影响
Influence of damping on the vanishing of the electro-optic effect in chiral isotropic media
摘要：
利用第一性原理，它表明，辐射阻尼单独不能导致一个非零的电光效应在手性各向同性介质。这一结论与用标准唯象模型计算阻尼效应所得的结论相反。我们表明，这些预测不同，因为唯象阻尼方程是有效的，只有在所施加的电磁场的频率是近共振的原子跃迁的区域。我们还表明，碰撞阻尼可以导致一个非零的电光效应，但强度足够弱，它是不太可能在现实的实验室条件下观察到的。
英文摘要：
Using first principles, it is demonstrated that radiative damping alone cannot lead to a nonvanishing electro-optic effect in a chiral isotropic medium. This conclusion is in contrast with that obtained by a calculation in which damping effects are included using the standard phenomenological model. We show that these predictions differ because the phenomenological damping equations are valid only in regions where the frequencies of the applied electromagnetic fields are nearly resonant with the atomic transitions. We also show that collisional damping can lead to a nonvanishing electrooptic effect, but with a strength sufficiently weak that it is unlikely to be observable under realistic laboratory conditions.
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