Finite Temperature Density Matrix Renormalization using an enlarged Hilbert space
arXiv:cond-mat/0510124 · doi:10.1103/PhysRevB.72.220401
Abstract
We apply a generalization of the time-dependent DMRG to study finite temperature properties of several quantum spin chains, including the frustrated $J_1-J_2$ model. We discuss several practical issues with the method, including use of quantum numbers and finite size effects. We compare with transfer-matrix DMRG, finding that both methods produce excellent results.
4 pages and 4 figures