Photon emission in the graphene under the action of a quasiconstant external electric field
Department of Physics, Tomsk State University, 634050, Tomsk, Russia
2 Department of General and Experimental Physics, Herzen State Pedagogical University of Russia, 48 Moyka Embankment, 191186, St. Petersburg, Russia
3 P.N. Lebedev Physical Institute, 53 Leninskiy Prospect, 119991, Moscow, Russia
4 Institute of Physics, University of São Paulo, CP 66318, 05315-970, São Paulo, SP, Brazil
Accepted: 8 February 2023
Published online: 22 February 2023
Following a nonperturbative formulation of strong-field QED developed in our earlier works, and using the Dirac model of the graphene, we construct a reduced QED to describe one species of the Dirac fermions in the graphene interacting with an external electric field and photons. On this base, we consider the photon emission in this model and construct closed formulas for the total probabilities. Using the derived formulas, we study probabilities for the photon emission by an electron and for the photon emission accompanying the vacuum instability in the quasiconstant electric field that acts in the graphene plane during the time interval T. We study angular and polarization distribution of the emission as well as emission characteristics in a high-frequency and low-frequency approximations. We analyze the applicability of the presented calculations to the graphene physics in laboratory conditions. In fact, we are talking about a possible observation of the Schwinger effect in these conditions.
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