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mathbf{Z}_{n}$ clock models and chains of $so(n)_2$ non-Abelian anyons: symmetries, integrable points and low energy properties
Finch, Peter E ; Flohr, Michael ; Frahm, Holger
2017-10
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Título:
mathbf{Z}_{n}$ clock models and chains of $so(n)_2$ non-Abelian anyons: symmetries, integrable points and low energy properties
Autor:
Finch, Peter E
;
Flohr, Michael
;
Frahm, Holger
Assuntos:
Mathematics - Mathematical Physics
;
Physics - High Energy Physics - Theory
;
Physics - Mathematical Physics
;
Physics - Statistical Mechanics
Descrição:
J. Stat. Mech. (2018) 023103 We study two families of quantum models which have been used previously to investigate the effect of topological symmetries in one-dimensional correlated matter. Various striking similarities are observed between certain $\mathbf{Z}_n$ quantum clock models, spin chains generalizing the Ising model, and chains of non-Abelian anyons constructed from the $so(n)_2$ fusion category for odd $n$, both subject to periodic boundary conditions. In spite of the differences between these two types of quantum chains, e.g.\ their Hilbert spaces being spanned by tensor products of local spin states or fusion paths of anyons, the symmetries of the lattice models are shown to be closely related. Furthermore, under a suitable mapping between the parameters describing the interaction between spins and anyons the respective Hamiltonians share part of their energy spectrum (although their degeneracies may differ). This spin-anyon correspondence can be extended by fine-tuning of the coupling constants leading to exactly solvable models. We show that the algebraic structures underlying the integrability of the clock models and the anyon chain are the same. For $n=3,5,7$ we perform an extensive finite size study -- both numerical and based on the exact solution -- of these models to map out their ground state phase diagram and to identify the effective field theories describing their low energy behaviour. We observe that the continuum limit at the integrable points can be described by rational conformal field theories with extended symmetry algebras which can be related to the discrete ones of the lattice models.
Data de criação/publicação:
2017-10
Idioma:
Inglês
Links
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