Bethe ansatz for two-magnon bound states in anisotropic magnetic chains of arbitrary spin
- 1 January 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (1) , 342-351
- https://doi.org/10.1103/physrevb.35.342
Abstract
The two-magnon spectra in anisotropic magnetic chains of arbitrary spin are derived by an elementary method which is an extension of Bethe’s original ansatz for spin-(1/2) systems. Applications are presented for quantum spin chains with uniaxial or Ising Anisotropy as well as chains with quartic exchange interactions. The nature of certain collective modes emerging in a 1/n expansion is also clarified.Keywords
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