Integral representations for correlation functions of the<i>XXZ</i>chain at finite temperature
Integral representations for correlation functions of the<i>XXZ</i>chain at finite temperature
We derive a novel multiple integral representation for a generating function of the σ z -σ z correlation functions of the spin-1 2 XXZ chain at finite temperature and finite, longitudinal magnetic field.Our work combines algebraic Bethe ansatz techniques for the calculation of matrix elements with the quantum transfer matrix …