Wojciech De Roeck
Large deviations for currents in the spin-boson model
(104K, Latex)

ABSTRACT.  We consider 
a finite quantum system coupled to quasifree thermal reservoirs at 
different temperatures. Under the assumptions of small coupling 
and exponential decay of the reservoir correlation function, the 
large deviation generating function is shown to be analytic on a 
compact set. Our method is different from the spectral deformation 
technique which was introduced recently in the study of 
spin-boson-like models. As a corollary, we derive the 
Gallavotti-Cohen fluctuation relation for the entropy production.