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Measurements of quasiparticle tunneling in the υ = 5 2 fractional quantum Hall state

Measurements of quasiparticle tunneling in the υ = 5 2 fractional quantum Hall state Some models of the 5/2 fractional quantum Hall state predict that the quasiparticles, which carry the charge, have non-Abelian statistics: exchange of two quasiparticles changes the wave function more dramatically than just the usual change of phase factor. Such non-Abelian statistics would make the system less sensitive to decoherence, making it a candidate for implementation of topological quantum computation. We measure quasiparticle tunneling as a function of temperature and dc bias between counterpropagating edge states. Fits to theory give e * , the quasiparticle effective charge, close to the expected value of e /4 and g , the strength of the interaction between quasiparticles, close to 3/8. Fits corresponding to the various proposed wave functions, along with qualitative features of the data, strongly favor the Abelian 331 state. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Measurements of quasiparticle tunneling in the υ = 5 2 fractional quantum Hall state

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References (5)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2012 The American Physical Society
ISSN
1550-235X
DOI
10.1103/PhysRevB.85.165321
Publisher site
See Article on Publisher Site

Abstract

Some models of the 5/2 fractional quantum Hall state predict that the quasiparticles, which carry the charge, have non-Abelian statistics: exchange of two quasiparticles changes the wave function more dramatically than just the usual change of phase factor. Such non-Abelian statistics would make the system less sensitive to decoherence, making it a candidate for implementation of topological quantum computation. We measure quasiparticle tunneling as a function of temperature and dc bias between counterpropagating edge states. Fits to theory give e * , the quasiparticle effective charge, close to the expected value of e /4 and g , the strength of the interaction between quasiparticles, close to 3/8. Fits corresponding to the various proposed wave functions, along with qualitative features of the data, strongly favor the Abelian 331 state.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Apr 15, 2012

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