%0 Journal Article
%T On the problem of unboundedness from below of the spinor QED Hamiltonian
%A L. G. Zastavenko
%J Physics
%D 1993
%I arXiv
%X We show that the Hamiltonian $ h= H_{QED}+H_2$, where $H_{QED}$ is the spinor QED Hamiltonian and $H_2$ is the positive transversal photon mass term, is unbounded from below if the electromagnetic coupling constant $e^2$ is small enough, $e^2<e^2_0 $, and the transversal photon squared mass parameter $M^2$ is not too large: $0\leq M^2<e^2l^2c$, here, $l$ is the cut-off parameter, and $c$ and $e^2_0$, positive constants which do not depend on any parameters.
%U http://arxiv.org/abs/hep-th/9302128v1