Transition rates via Bethe ansatz for the spin- Heisenberg chain
Bergische Universität Wuppertal, Fachbereich Physik - D-42097
2 Department of Physics, University of Rhode Island - Kingston, RI 02881-0817, USA
Accepted: 1 July 2002
We use the exact determinantal representation derived by Kitanine, Maillet, and Terras for matrix elements of local spin operators between Bethe wave functions of the one-dimensional Heisenberg model to calculate and numerically evaluate transition rates pertaining to dynamic spin structure factors. For real solutions of the Bethe ansatz equations, the size of the determinants is of order . We present applications to the zero-temperature spin fluctuations parallel and perpendicular to an external magnetic field.
PACS: 75.10.-b – General theory and models of magnetic ordering
© EDP Sciences, 2002