CMTopic

Non-Abelian quantum Hall states and anyon braiding

In some quantum Hall states, quasiparticles called non-Abelian anyons store information in how they are wound around each other, so that swapping them performs an operation that depends on the order of swaps. The $5/2$ state in gallium arsenide and half-integer states in bilayer graphene are the main candidates, but their identity and braiding are still being established.

Why it matters

Proving non-Abelian statistics would establish a new kind of quantum particle and the physical basis of topological quantum computing.

Review

C. Nayak, S. H. Simon, A. Stern, M. Freedman, S. Das Sarma, Non-Abelian anyons and topological quantum computation, Reviews of Modern Physics, 2008. https://arxiv.org/abs/0707.1889 reference checked

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