The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model

Details The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model

2007-03-19

arxiv.org/abs/cond-mat/0703490v2

Phys.Rev.Lett.99:050402,2007

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevLett.99.050402

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.

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