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Transition rates via Bethe ansatz for the spin-1/2 planar XXZ antiferromagnet

Daniel Biegel·Michael Karbach·Gerhard Mueller
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Abstract

A novel determinantal representation for matrix elements of local spin operators between Bethe wave functions of the one-dimensional s=1/2 XXZ model is used to calculate transition rates for dynamic spin structure factors in the planar regime. In a first application, high-precision numerical data are presented for lineshapes and band edge singularities of the in-plane (xx) two-spinon dynamic spin structure factor.

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Daniel Biegel, Michael Karbach, Gerhard Mueller. 2003-03-08. Transition rates via Bethe ansatz for the spin-1/2 planar XXZ antiferromagnet. https://doi.org/10.1088/0305-4470%2F36%2F20%2F301

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