Radiation Accompanying the Schwinger Effect in the Graphene

We investigate the quasiclassical and quantum radiation accompanying creation of the electron-hole plasma (EHP) in the graphene under action of the strong electromagnetic field (Sauter–Schwinger effect). The quasiclassical radiation of the plasma currents by virtue of massless of the theory with a high degree of precision reproduces the spectrum of the external field whereas the spectrum of the quantum radiation is sufficiently wide. It allows to carry out experimental verification of the theory.