Is demagnetization an efficient optimization method?

Details Is demagnetization an efficient optimization method? Is demagnetization an efficient optimization method?

2005-07-13

arxiv.org/abs/cond-mat/0507297v1

J. Magn. Magn. Mat 272-276, E1009 (2004)

Physics

Condensed Matter

Statistical Mechanics

2 pages, 1 figure

Scientific paper

Demagnetization, commonly employed to study ferromagnets, has been proposed as the basis for an optimization tool, a method to find the ground state of a disordered system. Here we present a detailed comparison between the ground state and the demagnetized state in the random field Ising model, combing exact results in $d=1$ and numerical solutions in $d=3$. We show that there are important differences between the two states that persist in the thermodynamic limit and thus conclude that AC demagnetization is not an efficient optimization method.

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