Exact dynamical structure factor of the degenerate haldane-shastry model

Takashi Yamamoto, Yasuhiro Saiga, Mitsuhiro Arikawa, Yoshio Kuramoto

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r2 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 languageEnglish
Pages (from-to)1308-1311
Number of pages4
JournalPhysical review letters
Issue number6
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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