Ultimate braid-group generators for coordinate exchanges of Ising anyons from the multi-anyon Pfaffian wave functions

Abstract

We give a rigorous and self-consistent derivation of the elementary braid matrices representing the exchanges of adjacent Ising anyons in the two inequivalent representations of the Pfaffian quantum Hall states with even and odd number of Majorana fermions. To this end we use the distinct operator product expansions of the chiral spin fields in the Neveu-Schwarz and Ramond sectors of the two-dimensional Ising conformal field theory. We find recursive relations for the generators of the irreducible representations of the braid group B_{2n+2} in terms of those for B_{2n}, as well as explicit formulas for almost all braid matrices for exchanges of Ising anyons. Finally we prove that the braid-group representations obtained from the multi-anyon Pfaffian wave functions are completely equivalent to the spinor representations of SO(2n+2) and give the equivalence matrices explicitly. This actually proves that the correlation functions of 2n chiral Ising spin fields sigma do indeed realize one of the two inequivalent spinor representations of the rotation group SO(2n) as conjectured by Nayak and Wilczek.

21 pages, expanded introduction, added one more section and references

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Cited by in corpus (8)

• Non-abelian anyons from degenerate Landau levels of ultracold atoms in artificial gauge potentials
• Ultracold atoms in U(2) non-Abelian gauge potentials preserving the Landau levels
• Braid Matrices and Quantum Gates for Ising Anyons Topological Quantum Computation
• Quantum teleportation using Ising anyons
• Systematic construction of topological-nontopological hybrid universal quantum gates based on many-body Majorana fermion interactions
• Entangled multi-knot lattice model of anyon current
• Topological quantum compilation of metaplectic anyons based on the genetic optimized algorithms
• Computational equivalence of the two inequivalent spinor representations of the braid group in the Ising topological quantum computer