Expansions for one quasiparticle states in spin 1/2 systems

Details Expansions for one quasiparticle states in spin 1/2 systems Expansions for one quasiparticle states in spin 1/2 systems

2001-04-11

arxiv.org/abs/cond-mat/0104199v2

J. Stat. Phys., vol. 108, 2002, pages 373-399

Physics

Condensed Matter

Statistical Mechanics

22 pages

Scientific paper

Convergent expansions of the wavefunctions for the ground state and low-lying
excited states of quantum transverse Ising systems are obtained. These
expansions are employed to prove that the dispersion relation for a single
quasi-particle has a convergent expansion.

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