Correlation equalities and upper bounds for the transverse Ising model
arXiv:1202.2237 · doi:10.1088/1742-5468/2012/05/P05006
Abstract
Starting from an exact formal identity for the two-state transverse Ising model and using correlation inequalities rigorous upper bounds for the critical temperature and the critical transverse field are obtained which improve effective results.
8 pages, 1 figure