01-147 Nilanjana Datta, Tom Kennedy
Expansions for one quasiparticle states in spin 1/2 systems (59K, LaTex) Apr 20, 01
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Abstract. 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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