Abstract
We study numerically the number of single-spin-flip stable states in the T=0 random field Ising model on random regular graphs of connectivity z=2 and z=4 and on the cubic lattice. The annealed and quenched complexities (i.e., the entropy densities) of the metastable states with given magnetization are calculated as a function of the external magnetic field. The results show that the appearance of a (disorder-induced) out-of-equilibrium phase transition in the magnetization hysteresis loop at low disorder can be ascribed to a change in the distribution of the metastable states in the field-magnetization plane.
Original language | English |
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Article number | 064422 |
Number of pages | 13 |
Journal | Physical Review B Condensed Matter and Materials Physics |
Volume | 77 |
Issue number | 6 |
DOIs | |
Publication status | Published - 20 Feb 2008 |