Monte Carlo simulations of spin glasses at low temperatures: Effects of free boundary conditions

Details Monte Carlo simulations of spin glasses at low temperatures: Effects of free boundary conditions Monte Carlo simulations of spin glasses at low temperatures: Effects of free boundary conditions

2001-08-31

arxiv.org/abs/cond-mat/0108544v2

Phys. Rev. B 65, 214402, (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 14 figures

Scientific paper

10.1103/PhysRevB.65.214402

We present results of Monte Carlo simulations, using parallel tempering, on the three- and four-dimensional Edwards-Anderson Ising spin glass with Gaussian couplings at low temperatures with free boundary conditions. Our results suggest that large-scale low-energy excitations may be space filling. The data implies that the energy of these excitations increases with increasing system size for small systems, but we see evidence in three dimensions, where we have a greater range of sizes, for a crossover to a regime where the energy is independent of system size, in accordance with replica symmetry breaking.

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