Low energy effective Hamiltonian for the XXZ spin chain

Abstract

Coupling constants for the most relevant terms in the low energy effective Hamiltonian of the XXZ spin chain are derived. Using this result we study the low energy (low temperature, weak magnetic field) thermodynamics, finite size effects and subleading long distance asymptotics of correlation functions.

20 pages, harvmac.tex, two epsf figures

Cited by in corpus (145)

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