8,237 research outputs found
Self-Annealing Dynamics in a Multistable System
A new type of dynamical behavior of a multistable system is reported. We
found that a simple non-equilibrium system can reduce its effective temperature
autonomously at a global minimum if the residual frustration at a global
minimum is small enough, which highlights an unexpected feature of
non-equilibrium multistable systems.Comment: 6 pages, Figures available upon reques
Quantum ferromagnetic transition in disordered itinerant electron systems
An effective field theory is derived for the ferromagnetic transition of
diffusive electrons at T=0. The static disorder which leads to diffusive
electron dynamics induces an effective long-range interaction between the spins
of the form 1/r^(2d-2). This leads to unusual scaling behavior at the quantum
critical point, which is determined exactly. The crossover from this quantum
fixed point to the classical Heisenberg fixed point should be observable in
ferromagnetic materials with low Curie temperatures.Comment: 4pp, REVTeX, no figs, final version as publishe
- …