2 papers
cond-mat.str-el2003
Spectrum and transition rates of the XX chain analyzed via Bethe ansatz
Daniel Biegel, Michael Karbach, Gerhard Muller +1
As part of a study that investigates the dynamics of the s=1/2 XXZ model in the planar regime |Delta|<1, we discuss the singular nature of the Bethe ansatz equations for the case D…
cond-mat.str-el2003
Transition rates via Bethe ansatz for the spin-1/2 planar XXZ antiferromagnet
Daniel Biegel, Michael Karbach, Gerhard Mueller
A novel determinantal representation for matrix elements of local spin operators between Bethe wave functions of the one-dimensional s=1/2 XXZ model is used to calculate transition…