https://arxiv.org/abs/cond-mat/0207279
[cond-mat/0207279] The spin-1/2 anisotropic Heisenberg-chain in longitudinal and transversal...
Abstract page for arXiv paper cond-mat/0207279: The spin-1/2 anisotropic Heisenberg-chain in longitudinal and transversal magnetic fields: a DMRG study