Anomalous fluctuations for a perturbed Hamiltonian system with   exponential interactions
  A one-dimensional Hamiltonian system with exponential interactions perturbed by a conservative noise is considered. It is proved that energy superdiffuses and upper and lower bounds describing this anomalous diffusion are obtained 
Cedric Bernardin (UMPA-ENSL), P. Gon\c{c}alves (CMAT)
cond-mat.stat-mech math.PR