Dissipation effects in percolating quantum Ising magnets
无序系统与神经网络
2008-03-04 v2 统计力学
摘要
We study the effects of dissipation on a randomly dilute transverse-field Ising magnet at and close to the percolation threshold. For weak transverse fields, a novel percolation quantum phase transition separates a super-paramagnetic cluster phase from an inhomogeneously ordered ferromagnetic phase. The properties of this transition are dominated by large frozen and slowly fluctuating percolation clusters. Implementing numerically a strong-disorder real space renormalization group technique, we compute the low-energy density of states which is found to be in good agreement with the analytical prediction.
引用
@article{arxiv.cond-mat/0703557,
title = {Dissipation effects in percolating quantum Ising magnets},
author = {J. A. Hoyos and Thomas Vojta},
journal= {arXiv preprint arXiv:cond-mat/0703557},
year = {2008}
}
备注
2 pages, 1 eps figure, final version as published