Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2005-11-21
J. Stat. Mech. (2006) P01008
Physics
Condensed Matter
Disordered Systems and Neural Networks
7 pages (2 columns), 9 figures, published with minor changes, one reference updated after the publication
Scientific paper
10.1088/1742-5468/2006/01/P01008
We investigate the properties of quantum annealing applied to the random field Ising model in one, two and three dimensions. The decay rate of the residual energy, defined as the energy excess from the ground state, is find to be $e_{res}\sim \log(N_{MC})^{-\zeta}$ with $\zeta$ in the range $2...6$, depending on the strength of the random field. Systems with ``large clusters'' are harder to optimize as measured by $\zeta$. Our numerical results suggest that in the ordered phase $\zeta=2$ whereas in the paramagnetic phase the annealing procedure can be tuned so that $\zeta\to6$.
Alava Mikko
Petäjä Viljo
Sarjala Matti
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