arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.3300hep-th
收藏

非均匀电磁场中的强标量QED

Strong Scalar QED in Inhomogeneous Electromagnetic Fields

Sang Pyo Kim

摘要:

强QED最近引起了人们的关注,部分原因是许多天体物理现象已经被观察到涉及超过临界强度的电磁场产生电子-正电子对,部分原因是地球实验将在不久的将来产生超过或接近临界强度的电磁场。在这次演讲中,我们批判性地回顾了涉及强外部电磁场的QED现象。强QED的特征是由于量子涨落引起的真空极化和由于真空不稳定性引起的电子对产生。阐述了非均匀电场在零温或有限温下产生电子对的正则方法。提出了一种计算有限时间、空间局域电场和振荡电场的电子对产生率的算法。最后,强QED在天体物理学中被讨论,特别是奇异星。

英文摘要:

Strong QED has attracted attention recently partly because many astrophysical phenomena have been observed to involve electromagnetic fields beyond the critical strength for electron-positron pair production and partly because terrestrial experiments will generate electromagnetic fields above or near the critical strength in the near future. In this talk we critically review QED phenomena involving strong external electromagnetic fields. Strong QED is characterized by vacuum polarization due to quantum fluctuations and pair production due to the vacuum instability. A canonical method is elaborated for pair production at zero or finite temperature by inhomogeneous electric fields. An algorithm is advanced to calculate pair production rate for electric fields acting for finite periods of time or localized in space or oscillating electric fields. Finally, strong QED is discussed in astrophysics, in particular, strange stars.

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。

↑