Quasi-particles in the chiral Potts model

Abstract

We study the quasi-particle spectrum of the integrable three-state chiral Potts chain in the massive phase by combining a numerical study of the zeroes of associated transfer matrix eigenvalues with the exact results of the ferromagnetic three-state Potts chain and the three-state superintegrable chiral Potts model. We find that the spectrum is described in terms of quasi-particles with momenta restricted only to segments of the Brillouin zone $0\le P\le 2\pi$ where the boundaries of the segments depend on the chiral angles of the model.

19 pages in harvmac plus 9 figures appended to the file. (Several references have been added). ITPSB 94-012

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