Stolze, JoachimVerkholyak, TarasDerzhko, OlegKrokhmalskii, Taras2008-06-092008-06-092008Verkholyak, Taras; Derzhko, Oleg; Krokhmalskii, Taras; Stolze, Joachim: Dynamic correlations in a random spin-1/2 XY chain. In:http://hdl.handle.net/2003/25460http://dx.doi.org/10.17877/DE290R-8075We examine dynamic quantities of a random spin-1/2 isotropic XY chain in a transverse field. The randomness is related to the sign of the nearest-neighbor exchange interaction and can be eliminated by a suitable transformation. As a result, the dynamic quantities for the random spin chain are related to the same dynamic quantities for the homogeneous spin chain. We use the available results for the latter model to discuss the effect of randomness on the dynamic structure factors of the quantum spin chain.enCopyright 2008 Institute of Physics, Polish Academy of Sciences530Texthttp://przyrbwn.icm.edu.pl/APP/ABSTR/113/a113-1-108.html