Abstract:
We consider a multiple-integral representation for a one-parameter generating function of the finite temperature Sz–Sz correlation functions of the antiferromagnetic spin-1/2XXZ chain in the XX limit and in the Ising limit. We show how the multiple integrals reduce to single integrals in these limits, thus reproducing known results.
Keywords:
quantum spin chain, exact finite-temperature correlation functions, XX model.
Citation:
F. Gohmann, A. Seel, “The XX and Ising Limits in Integral Formulas for Finite-Temperature Correlation Functions of the XXZ Chain”, TMF, 146:1 (2006), 146–160; Theoret. and Math. Phys., 146:1 (2006), 119–130