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arXiv 1507.07802hep-phcond-mat.stat-mechhep-th
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临界Schwinger对产生

Critical Schwinger pair production

Holger Gies, Greger Torgrimsson

摘要:

我们研究了空间非均匀电背景中的施温格对产生。一个临界点的开始对生产可以接近的领域,边际提供足够的静电能量的离壳长程电子-正电子波动成为一个真正的对。接近这个临界点,我们观察到的特点的普遍性,这是类似于连续的相变的临界现象与成对生产率作为一个序参量:电背景可以细分为普遍性类和发病对生产表现出特征标度律。电背景场的适当设计可以在幂律缩放、基本BKT型缩放和具有对数校正的幂律缩放之间进行内插。相应的临界指数只取决于大尺度的电背景的功能,而背景的微观细节发挥的作用无关的扰动不影响临界性。

英文摘要:

We investigate Schwinger pair production in spatially inhomogeneous electric backgrounds. A critical point for the onset of pair production can be approached by fields that marginally provide sufficient electrostatic energy for an off-shell long-range electron-positron fluctuation to become a real pair. Close to this critical point, we observe features of universality which are analogous to continuous phase transitions in critical phenomena with the pair-production rate serving as an order parameter: electric backgrounds can be subdivided into universality classes and the onset of pair production exhibits characteristic scaling laws. An appropriate design of the electric background field can interpolate between power-law scaling, essential BKT-type scaling and a power-law scaling with log corrections. The corresponding critical exponents only depend on the large-scale features of the electric background, whereas the microscopic details of the background play the role of irrelevant perturbations not affecting criticality.

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