Transport in the Laughlin quasiparticle interferometer: Evidence for topological protection in an anyonic qubit

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dc.creatorCamino, F. E.
dc.creatorZhou, W.
dc.creatorGoldman, V. J.
dc.date2006-06-28
dc.date.accessioned2026-07-07T07:12:55Z
dc.date.available2026-07-07T07:12:55Z
dc.descriptionWe report experiments on temperature and Hall voltage bias dependence of the superperiodic conductance oscillations in the novel Laughlin quasiparticle interferometer, where quasiparticles of the 1/3 fractional quantum Hall fluid execute a closed path around an island of the 2/5 fluid. The amplitude of the oscillations fits well the quantum-coherent thermal dephasing dependence predicted for a two point-contact chiral edge channel interferometer in the full experimental temperature range 10.2<T<141 mK. The temperature dependence observed in the interferometer is clearly distinct from the behavior in single-particle resonant tunneling and Coulomb blockade devices. The 5h/e flux superperiod, originating in the anyonic statistical interaction of Laughlin quasiparticles, persists to a relatively high T~140 mK. This temperature is only an order of magnitude less than the 2/5 quantum Hall gap. Such protection of quantum logic by the topological order of fractional quantum Hall fluids is expected to facilitate fault-tolerant quantum computation with anyons.
dc.description13 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0606742
dc.identifierhttp://arxiv.org/abs/cond-mat/0606742
dc.identifierPhys. Rev. B 74, 115301 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.115301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112254
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleTransport in the Laughlin quasiparticle interferometer: Evidence for topological protection in an anyonic qubit
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