Dynamics of the spin-½ isotropic<i>XY</i>chain in a transverse field
Dynamics of the spin-½ isotropic<i>XY</i>chain in a transverse field
Dynamic xx and xy spin pair correlation functions for the isotropic spin-½ XY chain are calculated numerically for long open chains in the presence of a transverse (z) magnetic field at finite temperature. From these data the first numerical results for the dynamic structure factors Sxx(κ,ω) and Sxy(κ,ω) are obtained …