arXiv:cond-mat/0703490·v2·Statistical Mechanics
The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model
P. Ribeiro🇫🇷 · J. Vidal🇫🇷 · R. Mosseri🇫🇷
Abstract
A method based on the analyzis of the Majorana polynomial roots is introduced to compute the spectrum of the Lipkin-Meshkov-Glick model in the thermodynamical limit. A rich structure made of four qualitatively different regions is revealed in the parameter space whereas the ground state study only distinguishes between two phases.
Comments: 4 pages, 3 figures, published version