Classical and Quantum GravityNo Access

IS QFT WITH EXTERNAL BACKGROUNDS A CONSISTENT MODEL?

Institute of Physics, University of São Paulo, R. do Matão, Travessa R, 187, CP 66318, São Paulo-São Paulo, CEP 05580-090, Brazil

Department of General and Experimental Physics, Herzen State Pedagogical University of Russia, Moyka emb. 48, 191186 St. Petersburg, Russia

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D. M. GITMAN

Institute of Physics, University of São Paulo, R. do Matão, Travessa R, 187, CP 66318, São Paulo-São Paulo, CEP 05580-090, Brazil

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https://doi.org/10.1142/S0217751X11054218Cited by:1 (Source: Crossref)

Abstract

We discuss consistency of the concept of external background in QFT. Different restrictions on magnitude of magnetic and electric fields are analyzed. The back reaction due to strong electric field is calculated and restrictions on the magnitude and duration of such a field are obtained. The problem of consistency of Dirac equation with a superstrong Coulomb field is discussed.

Keywords:

PACS: 11.10.-z, 03.70.+k

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