Experimental simulation of anyonic fractional statistics with an NMR quantum information processor

Abstract

Anyons have exotic statistical properties, fractional statistics, differing from Bosons and Fermions. They can be created as excitations of some Hamiltonian models. Here we present an experimental demonstration of anyonic fractional statistics by simulating a version of the Kitaev spin lattice model proposed by Han et al[Phys. Rev.Lett. 98, 150404 (2007)] using an NMR quantum information processor. We use a 7-qubit system to prepare a 6-qubit pseudopure state to implement the ground state preparation and realize anyonic manipulations, including creation, braiding and anyon fusion. A $\pi /2\times 2$ phase difference between the states with and without anyon braiding, which is equivalent to two successive particle exchanges, is observed. This is different from the $\pi \times 2$ and $2\pi \times 2$ phases for Fermions and Bosons after two successive particle exchanges, and is consistent with the fractional statistics of anyons.

7 pages, 7 figures

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