- 96-19 Francesca R. Nardi, Enzo Olivieri
- LOW TEMPERATURE STOCHASTIC DYNAMICS
FOR AN ISING MODEL
WITH ALTERNATING FIELD.
(272K, Plaintex)
Jan 24, 96
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Abstract. We study, in the low temperature regime, a 2D stochastic
Ising system with nearest neighbour ferromagnetic interaction
subject to a positive (negative) magnetic field on even (odd) horizontal lines.
We find, for different values of the magnetic fields,
very different dynamical behaviours which are strictly related to the
peculiar features of
the expected equilibrium phase diagram at low temperature.
In particular we analyse in detail the metastable behaviour
(lifetime of the metastable equilibrium, typical paths during the transition to
the stable equilibrium) in the vicinities of
a ``low-temperature critical point".
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