Unconventional critical activated scaling of two-dimensional quantum spin-glasses
Statistical Mechanics
2016-07-26 v2 Disordered Systems and Neural Networks
Other Condensed Matter
Abstract
We study the critical behavior of two-dimensional short-range quantum spin glasses by numerical simulations. Using a parallel tempering algorithm, we calculate the Binder cumulant for the Ising spin glass in a transverse magnetic field with two different short-range bond distributions, the bimodal and the Gaussian ones. Through an exhaustive finite-size scaling analysis, we show that the universality class does not depend on the exact form of the bond distribution but, most important, that the quantum critical behavior is governed by an infinite randomness fixed point.
Keywords
Cite
@article{arxiv.1512.03594,
title = {Unconventional critical activated scaling of two-dimensional quantum spin-glasses},
author = {D. A. Matoz-Fernandez and F. Roma},
journal= {arXiv preprint arXiv:1512.03594},
year = {2016}
}
Comments
6 pages, 6 figures