Decoherence of Anyonic Charge in Interferometry Measurements

Details Decoherence of Anyonic Charge in Interferometry Measurements Decoherence of Anyonic Charge in Interferometry Measurements

2006-08-14

arxiv.org/abs/quant-ph/0608119v2

Phys. Rev. Lett. 98, 070401 (2007)

Physics

Quantum Physics

5 pages, 1 figure; v2: reference added, example added, clarifying changes made to conform to the version published in PRL

Scientific paper

10.1103/PhysRevLett.98.070401

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'.

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