arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1006.0774hep-thgr-qchep-phnucl-th
收藏

有限温度下的非微扰有效QED

Nonperturbative QED Effective Action at Finite Temperature

Sang Pyo Kim, Hyun Kyu Lee, Yongsung Yoon

摘要:

本文提出了一种计算非平衡量子场有限温度有效作用量的新方法,并在含时电场中得到了电荷对从平衡态演化出来的QED有效作用量。有效作用量的虚部由初始热系综的费米-狄拉克或玻色-爱因斯坦分布的热环组成,该热环与真空涨落因子加权。有效作用量的实部由产生的电子对的平均数、真空极化和热分布决定。产生对的平均数等于虚部的两倍。我们明确地发现有限温度有效作用在恒定电场。

英文摘要:

We advance a novel method for the finite-temperature effective action for nonequilibrium quantum fields and find the QED effective action in time-dependent electric fields, where charged pairs evolve out of equilibrium. The imaginary part of the effective action consists of thermal loops of the Fermi-Dirac or Bose-Einstein distribution for the initial thermal ensemble weighted with factors for vacuum fluctuations. And the real part of the effective action is determined by the mean number of produced pairs, vacuum polarization, and thermal distribution. The mean number of produced pairs is equal to twice the imaginary part. We explicitly find the finite-temperature effective action in a constant electric field.

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。

↑