The choice of the optimal approximation in the kinetic description of the vacuum creation of electron-positron plasma in strong laser fields

The paper justifies 𝐸2-similarity of kinetic equation solutions to describe vacuum emergence of electronpositron plasma under the effect of strong “laser” fields, where 𝐸(𝑡) is the intensity of the strong time-dependent “laser” field. The boundaries of existence of this similarity were studied.