Dynamics of quantum spin chains and multi-fermion excitation continua
O. Derzhko, T. Krokhmalskii, J. Stolze, G. Müller
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.
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