2 papers
math-ph2015
Eliminating unphysical photon components from Dirac-Maxwell Hamiltonian quantized in the Lorenz gauge
Shinichiro Futakuchi, Kouta Usui
We study the Dirac-Maxwell model quantized in the Lorenz gauge. In this gauge, the space of quantum mechanical state vectors inevitably be an indefinite metric vector space so that…
hep-lat2010
Direct Proof of Reflection Positivity of Free Overlap Dirac Fermion
Yoshio Kikukawa, Kouta Usui
It is shown that free lattice Dirac fermions defined by overlap Dirac operator fulfill the Osterwalder-Schrader reflection positivity condition with respect to the link-reflection.