Fumio Hiroshima, Akito Suzuki
Physical state for nonrelativistic quantum electrodynamics
(452K, pdf)

ABSTRACT.  A physical subspace and physical Hilbert space 
associated with 
asymptotic fields of 
nonrelativistic quantum electrodynamics 
are constructed through 
the Gupta-Bleuler procedure. 
Asymptotic completeness is shown and a 
physical Hamiltonian is defined on the 
physical Hilbert space.