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Journal articles
The dynamical spin structure factor for the anisotropic spin-1/2 Heisenberg chain
Abstract : The longitudinal spin structure factor for the XXZ-chain at small wave-vector q is obtained using Bethe Ansatz, field theory methods and the Density Matrix Renormalization Group. It consists of a peak with peculiar, non-Lorentzian shape and a high-frequency tail. We show that the width of the peak is proportional to q^2 for finite magnetic field compared to q^3 for zero field. For the tail we derive an analytic formula without any adjustable parameters and demonstrate that the integrability of the model directly affects the lineshape.
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00266542
Contributor : Jean Michel Maillet Connect in order to contact the contributor
Submitted on : Monday, March 24, 2008 - 4:55:44 PM
Last modification on : Friday, December 18, 2020 - 5:30:02 PM
Contributor : Jean Michel Maillet Connect in order to contact the contributor
Submitted on : Monday, March 24, 2008 - 4:55:44 PM
Last modification on : Friday, December 18, 2020 - 5:30:02 PM
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