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Aging in the three-dimensional Random Field Ising Model

Research paper by Sebastian von Ohr, Markus Manssen, Alexander K. Hartmann

Indexed on: 25 Jan '16Published on: 25 Jan '16Published in: Physics - Statistical Mechanics



Abstract

We studied the nonequilibrium aging behavior of the Random Field Ising Model in three dimensions for various values of the disorder strength. This allowed us to investigate how the aging behavior changes across the ferromagnetic-paramagnetic phase transition. We investigated a large system size of $N=256^3$ spins and up to $10^8$ Monte Carlo sweeps. To reach these necessary long simulation times we employed an implementation running on Intel Xeon Phi coprocessors, reaching single spin flip times as short as 6 ps. We measured typical correlation functions in space and time to extract a growing length scale and corresponding exponents.