Dynamics of quantum spin chains and multi-fermion excitation continua
arXiv:cond-mat/0508265 · doi:10.1016/j.physb.2006.01.192
Abstract
We use the Jordan-Wigner representation to study dynamic quantities for the spin-1/2 XX chain in a transverse magnetic field. We discuss in some detail the properties of the four-fermion excitation continuum which is probed by the dynamic trimer structure factor.
Presented at the SCES '05 - The International Conference on Strongly Correlated Electron Systems (Vienna, July 26-30, 2005)