Elaborating the phase diagram of spin-1 anyonic chains

Abstract

We revisit the phase diagram of spin-1 $su(2{)}_k$ anyonic chains, originally studied by Gils {\it et. al.} [Phys. Rev. B, {\bf 87} (23) (2013)]. These chains possess several integrable points, which were overlooked (or only briefly considered) so far. Exploiting integrability through a combination of algebraic techniques and exact Bethe ansatz results, we establish in particular the presence of new first order phase transitions, a new critical point described by a $Z_k$ parafermionic CFT, and of even more phases than originally conjectured. Our results leave room for yet more progress in the understanding of spin-1 anyonic chains.

28 pages, 8 figures Submitted to SciPost v2 : references and some discussions added, misprints corrected for the decomposition of Potts modules

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