5 papers
Effective field theory for He-IV
J. M. Carmona, S. Jimenez, J. Polonyi +1
We introduce an effective scalar field theory to describe the He-IV phase diagram, which can be considered as a generalization of the XY model which gives the usual lambda-transiti…
Rejuvenation and Memory in model Spin Glasses in 3 and 4 dimensions
S. Jimenez, V. Martin-Mayor, S. Perez-Gaviro
We numerically study aging for the Edwards-Anderson Model in 3 and 4 dimensions using different temperature-change protocols. In D=3, time scales a thousand times larger than in pr…
Phase diagram of the (bosonic) Double-Exchange Model
J. L. Alonso, A. Cruz, L. A. Fernandez +4
The phase diagram of the simplest approximation to Double-Exchange systems, the bosonic Double-Exchange model with antiferromagnetic super-exchange coupling, is fully worked out by…
Aging in Spin Glasses in three, four and infinite dimensions
S. Jimenez, V. Martin-Mayor, G. Parisi +1
The SUE machine is used to extend by a factor of 1000 the time-scale of previous studies of the aging, out-of-equilibrium dynamics of the Edwards-Anderson model with binary couplin…
Dynamical generation of a gauge symmetry in the Double-Exchange model
J. M. Carmona, A. Cruz, L. A. Fernandez +7
It is shown that a bosonic formulation of the double-exchange model, one of the classical models for magnetism, generates dynamically a gauge-invariant phase in a finite region of…