Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 108, Issue 3-4, Pages 373-399Publisher
KLUWER ACADEMIC/PLENUM PUBL
DOI: 10.1023/A:1015713005441
Keywords
quantum spins; quasiparticles; expansions; transverse Ising model
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Convergent expansions of the wavefunctions for the ground state and lowlying 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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