mgr Łukasz Juchnowski

The dynamical Schwinger effect in the electron-positron plasma

We study the dynamical Schwinger effect in the vacuum excitation of the electron-positron plasma under action of a "laser pulse" of the simplest configuration: a linearly polarized,time-dependent and spatially homogeneous electric field. Methodical basis of this investigation is the kinetic equation which is an exact consequence of the basic equations of motion of QED in the considered field model. In the present work we investigate some features of the residual electron-positron plasma and the transient process of its formation. Moreover we compare predictions on the basis of different WKB-type approximations with our results. Such a comparison demonstrates a considerable divergence. results in strong non-stationary fields.