Séminaire de groupe
|Ageing in bosonic contact processes with long-range transport|
|Laboratoire de Physique des Matériaux (Nancy 1)|
|mardi 07 juillet 2009 , 10h25|
|Salle de séminaire du groupe de Physique Statistique|
Ageing in systems without detailed balance is studied in bosonic contact and pair-contact processes with LÃ©vy diffusion. In the ageing regime, the dynamical scaling of the two-time correlation function and two-time response function is found and analysed. Exact results for non-equilibrium exponents and scaling functions are derived and has been used to test a formulation of local scale invariance for a dynamical exponent z < 2. The behaviour of the fluctuation-dissipation ratio is analysed. A passage time from the quasi-stationary regime to the ageing regime is defined, in qualitative agreement with kinetic spherical models and p-spin spherical glasses.