Braiding Fibonacci anyons

Abstract

Abstract Fibonacci anyons ε provide the simplest possible model of non-Abelian fusion rules: [1] × [1] = [0] ⊕ [1]. We propose a conformal field theory construction of topological quantum registers based on Fibonacci anyons realized as quasiparticle excitations in the ℤ3 parafermion fractional quantum Hall state. To this end, the results of Ardonne and Schoutens for the correlation function of four Fibonacci fields are extended to the case of arbitrary number n of quasi-holes and N = 3r electrons. Special attention is paid to the braiding properties of the obtained correlators. We explain in details the construction of a monodromy representation of the Artin braid group B $$ \mathcal{B} $$ n acting on n-point conformal blocks of Fibonacci anyons. The matrices of braid group generators are displayed explicitly for all n ≤ 8. A simple recursion formula makes it possible to extend without efforts the construction to any n. Finally, we construct N $$ \mathcal{N} $$ qubit computational spaces in terms of conformal blocks of 2 N $$ 2\mathcal{N} $$ + 2 Fibonacci anyons.

Keywords

• Anyons
• Field Theories in Lower Dimensions
• Topological States of Matter