Comments on QED with background electric fields
arXiv:0901.0424 · doi:10.1088/1367-2630/11/10/103048
Abstract
It is well known that there is a total cancellation of the \emph{factorizable} IR divergences in unitary interacting field theories, such as QED and quantum gravity. In this note we show that such a cancellation does not happen in QED with background electric fields which can produce pairs. There is no factorization of the IR divergences.
14 pages, 1 figure