arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.00399hep-th
收藏

强电场中产生的电子对的电流

Currents of created pairs in strong electric fields

E. T. Akhmedov, A. V. Anokhin, D. I. Sadekov

摘要:

本文用四维QED方法计算了不同初态下强背景电场中产生粒子的树能级电流。也就是说,我们在脉冲背景下对初始真空和过去无穷远处的热态进行了计算。在这两种情况下,我们发现,电流线性增长的脉冲长度与比例系数包含特征的施温格因子。对于恒定电场背景,我们计算了几种不同初始状态下的电流。我们观察到,在这种情况下,电流要么为零,要么线性发散。我们解释了这种行为的原因,并比较了普通和标量QED的情况。最后,我们计算了在二维的情况下,在这种设置时,所谓的克莱因悖论可以观察到的情况下的电流。

英文摘要:

We calculate tree--level currents of created particles in strong background electric fields in 4D QED for various initial states. Namely, we do that in pulse background for initial vacuum and thermal states at past infinity. In both cases we find that the current grows linearly with the length of the pulse with coefficients of proportionality containing the characteristic Schwinger's factor. For the constant electric field background we calculate the current for several different initial states. We observe that in such a case the current is either zero or linearly divergent. We explain the reason for such a behaviour and compare the situation in ordinary and scalar QED. Finally, we calculate the current in two--dimensional situation in the presence of such settings when the so called Klein paradox can be observed.

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。

↑