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arXiv 1301.1640physics.plasm-phhep-phphysics.optics
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强laser场中真空产生的正负电子等离子体的性质。准粒子激发

Properties of the electron-positron plasma created from vacuum in a strong laser field. Quasiparticle excitations

D. B. Blaschke, B. Kaempfer, S. M. Schmidt, A. D. Panferov, A. V. Prozorkevich, S. A. Smolyansky

摘要:

本文研究了强激光场作用下准粒子电子-正电子对在非微扰基础上产生真空的动力学方程的解。在较宽的激光辐射参数范围内,研究了准粒子电子(正电子)分布函数与粒子数密度的关系,电场强度E_0的波长λ和幅度。发现了三个域:真空极化效应区,其中e-e+对密度较小(“平静谷”);两个积累区,其中e-e+对的产生率大大增加,e-e+对密度可达到一个显著值(短波长区和强场区)。特别地,所得到的结果指出了在短波长λ \lessim λ acc} = π/m范围内物理真空的一个复杂的短距离电磁结构.对于中等强度的场E_0 \lesssim E_c=m^2/e,可以实现具有高密度e-e+准粒子的积累区。在这个领域的场强和在整个调查范围内的波长,动态施温格效应的观察可以促进。

英文摘要:

Solutions of a kinetic equation are investigated which describe, on a nonperturbative basis, the vacuum creation of quasiparticle electron-positron pairs due to a strong laser field. The dependence of the quasiparticle electron (positron) distribution function and the particle number density is explored in a wide range of the laser radiation parameters, i.e., the wavelength λand amplitude of electric field strength E_0. Three domains are found: the domain of vacuum polarization effects where the density of the e-e+ pairs is small (the "calm valley"), and two accumulation domains in which the production rate of the e-e+ pairs is strongly increased and the e-e+ pair density can reach a significant value (the short wave length domain and the strong field one). In particular, the obtained results point to a complicated short-distance electromagnetic structure of the physical vacuum in the domain of short wavelengths λ\lessim λ_{acc} = π/m. For moderately strong fields E_0 \lesssim E_c=m^2/e, the accumulation regime can be realized where a plasma with a high density of e-e+ quasiparticles can be achieved. In this domain of the field strengths and in the whole investigated range of wavelengths, an observation of the dynamical Schwinger effect can be facilitated.

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。

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