在含时光场中利用真空偏振修正的光锥条件
Modified light cone condition via vacuum polarization in a time dependent field
摘要:
在强磁场中出现的非常规真空特性一直是一个活跃的研究领域。本文采用两束反向传输的激光激发探测光在真空中传输的抽运-探测方案,研究了真空偏振效应。对于探测光通过抽运场的电磁波腹面的情况,解析地导出了探测光的修正光锥条件。推导不遵循通常采用的假设处理泵场作为一个恒定的字段。从传统的光锥条件的差异被确定。并结合真空双折射测量结果讨论了这一结果的意义。
英文摘要:
The appearance of unconventional vacuum properties in intense fields has long been an active field of research. In this paper the vacuum polarization effect is investigated via a pump probe scheme of a probe light propagating in the vacuum excited by two counter-propagating laser beams. The modified light cone condition of the probe light is derived analytically for the situation that it passes through the electric/magnetic antinode plane of the pump field. The derivation does not follow the commonly adopted assumption of treating the pump field as a constant field. Differences from the conventional light cone conditions are identified. The implications of the result are discussed with a consideration of the vacuum birefringence measurement.
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