Signatures of the Schwinger mechanism assisted by a fast-oscillating electric field
Signatures of the Schwinger mechanism assisted by a fast-oscillating electric field
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DOI：
10.1103/physrevd.100.116018
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发表时间：
2019-07
影响因子：
5
通讯作者：
S. Villalba-Ch'avez;C. Muller
中科院分区：
文献类型：
--
作者：
S. Villalba-Ch'avez;C. Muller
本文研究了在由弱强度的高频电模和强恒定电场组成的场结构中真空中自发产生电子-正电子对。通过考虑玻尔兹曼-弗拉索夫方程中的低密度近似，建立了统治这一非微扰过程的单粒子分布函数的渐近表达式。产生的粒子的密度率的解析公式的建立表明，表现出非微扰依赖于强，弱电场和隧道和多光子制度之间的插值。它表明-在适当的情况下-所产生的等离子体的电子和正电子可能达到的密度，它们的重组成高能光子发生丰富。根据这一特点，提出了一种观察动力学助移施温格效应的实验装置。
The spontaneous production of electron-positron pairs from the vacuum--in a field configuration composed of a high-frequency electric mode of weak intensity and a strong constant electric field--is investigated. Asymptotic expressions for the single-particle distribution function ruling this nonperturbative process are established by considering the low-density approximation in the Boltzmann-Vlasov equation. An analytical formula for the density rate of yielded particles is established which is shown to manifest a nonperturbative dependence on both the strong and weak electric fields and to interpolate between the tunneling and multi-photon regimes. It is shown that--under appropriate circumstances--the produced plasma of electrons and positrons might reach densities for which their recombinations into high-energy photons occurs copiously. On the basis of this feature, an experimental setup for observing the dynamically-assisted Schwinger effect is put forward.