title: Decoherence of anyonic charge in interferometry measurements.
abstract: We examine interferometric measurements of the topological charge of (non-Abelian) anyons. The target's topological charge is measured from its effect on the interference of probe particles sent through the interferometer. We find that superpositions of distinct anyonic charges a and a' in the target decohere (exponentially in the number of probes particles used) when the probes have nontrivial monodromy with the charges that may be fused with a to give a'.
authors.affiliation: California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Parsa
authors.initials: P
authors.lastname: Bonderson
authors.forename: Kirill
authors.initials: K
authors.lastname: Shtengel
authors.forename: J K
authors.initials: JK
authors.lastname: Slingerland