Paolo Dai Pra, Anna Maria Paganoni and Gustavo Posta
Entropy inequlities for unbounded spin systems
(261K, Postscript)

ABSTRACT.  We consider nonconservative, reversible spin systems, with 
unbounded discrete spins. We show that for a class of these 
dynamics in a high temperature regime, the relative entropy with 
respect to the equilibrium distribution decays exponentially in 
time, although the logarithmic-Sobolev inequality fails. To this 
end we prove a weaker modification of the logarithmic-Sobolev 
inequality.