Quantum walks with non-abelian anyons

Lauri Lehman*, Vaclav Zatloukal, Gavin K. Brennen, Jiannis K. Pachos, Zhenghan Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We study the single particle dynamics of a mobile non-Abelian anyon hopping around many pinned anyons on a surface, by modeling it with a discrete time quantum walk. During the evolution, the spatial degree of freedom of the mobile anyon becomes entangled with the fusion degrees of freedom of the collective system. Each quantum trajectory makes a closed braid on the world lines of the particles establishing a direct connection between statistical dynamics and quantum link invariants. We find that asymptotically a mobile Ising model anyon becomes so entangled with its environment that its statistical dynamics reduces to a classical random walk with linear dispersion in contrast to particles with Abelian statistics which have quadratic dispersion.

Original languageEnglish
Article number230404
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Issue number23
Publication statusPublished - 10 Jun 2011


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