Authors: Stolze, Joachim
Brandt, Uwe
Title: High-temperature dynamics of the anisotropic Heisenberg chain studied by moment methods
Language (ISO): en
Abstract: The dynamics of the anisotropic spin-l/2 nearest-neighbour Heisenberg chain is studied at infinite temperature. Low-order coefficients of the short-time expansions are computed for spin-spin and energy-density-energy-density correlation functions for cyclical as well as for open-ended chains. The commutator algebra necessary to generate these coefficients may be performed by a computer. The series obtained for the spin correlation function (up to order t^14 for a bulk spin and up to order t^18 for a boundary spin) and for the energy density correlation function are the longest ones available up to now. The coefficients are used to construct rigorous upper and lower bounds to autocorrelation functions and near-neighbour correlation functions.
URI: http://hdl.handle.net/2003/25420
http://dx.doi.org/10.17877/DE290R-8210
Issue Date: 1986-09
Rights: © Springer-Verlag 1986
Publisher: Springer-Verlag
URL: http://dx.doi.org/10.1007/BF01303603
Citation: Brandt, Uwe; Stolze, Joachim: High-temperature dynamics of the anisotropic Heisenberg chain studied by moment methods. In: Zeitschrift für Physik B Nr. Jg. 64(1986), S. 327-339, doi: 10.1007/BF01303603.
Appears in Collections:Stolze, Joachim Prof. Dr.

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