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arXiv · 1611.00832

Topological phases of parafermions: a model with exactly-solvable ground states

Fernando Iemini·Christophe Mora·Leonardo Mazza
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Abstract

Parafermions are emergent excitations that generalize Majorana fermions and can also realize topological order. In this paper we present a non-trivial and quasi-exactly-solvable model for a chain of parafermions in a topological phase. We compute and characterize the ground-state wave-functions, which are matrix-product states and have a particularly elegant interpretation in terms of Fock parafermions, reflecting the factorized nature of the ground states. Using these wavefunctions, we demonstrate analytically several signatures of topological order. Our study provides a starting point for the non-approximate study of topological one-dimensional parafermionic chains with spatial-inversion and time-reversal symmetry in the absence of strong edge modes.

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Fernando Iemini, Christophe Mora, Leonardo Mazza. 2017-04-11. Topological phases of parafermions: a model with exactly-solvable ground states. https://doi.org/10.1103/physrevlett.118.170402

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