### Abstract

The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r^{2} interaction is derived exactly at zero temperature for the arbitrary size of the system. The result is interpreted in terms of a free quasiparticle picture which is a generalization of the spinon picture in the SU(2) case. The excited states consist of K quasiparticles each of which is characterized by a set of K − 1 quantum numbers. Divergent singularities of s(q, w) at the spectral edges are derived analytically. The analytic result is checked numerically for finite systems.

Original language | English |
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Pages (from-to) | 1308-1311 |

Number of pages | 4 |

Journal | Physical Review Letters |

Volume | 84 |

Issue number | 6 |

DOIs | |

Publication status | Published - 2000 Jan 1 |

### ASJC Scopus subject areas

- Physics and Astronomy(all)

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## Cite this

Yamamoto, T., Saiga, Y., Arikawa, M., & Kuramoto, Y. (2000). Exact dynamical structure factor of the degenerate haldane-shastry model.

*Physical Review Letters*,*84*(6), 1308-1311. https://doi.org/10.1103/PhysRevLett.84.1308