Properties of the electron-positron plasma created from vacuum in a strong Laser Field I. Quasiparticle excitations
Properties of the electron-positron plasma created from vacuum in a strong Laser Field I. Quasiparticle excitations
Blaschke, D.; Kämpfer, B.; Schmidt, S. M.; Panferov, A. D.; Prozorkevich, A. V.; Smolyansky, S. A.
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 \lambda and 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 \lambda \lessim \lambda_{acc} = \pi/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.
-
Contribution to WWW
e-Print: arXiv:1301.1640 [physics.plasm-ph]: http://arxiv.org/abs/arXiv:1301.1640 -
Physical Review D 88(2013), 045017
DOI: 10.1103/PhysRevD.88.045017
Cited 24 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-18628
Publ.-Id: 18628