Vladimir Georgescu, Christian Gerard, Jacob Schach-Moeller
Spectral Theory of Massless Pauli-Fierz Models
(779K, Postscript)

ABSTRACT.  We study the spectral theory of massless Pauli-Fierz models using an 
extension of the Mourre method. We prove the local finiteness of 
point spectrum and a limiting absorption principle away from 
the eigenvalues for an arbitrary coupling constant. In addition we 
show that the expectation value of the number operator is finite on 
all eigenvectors.