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We study a tunneling geometry defined by a single point-contact constrictionthat brings to close vicinity two points sitting at the same edge of a quantumHall liquid, shortening the trip between the otherwise spatially separatedpoints along the normal chiral edge path. This ``wormhole''-like geometryallows for entrapping bulk quasiparticles between the edge path and the tunneljunction, possibly realizing a topologically protected qubit if thequasiparticles have non-Abelian statistics. We show how either noise or simplervoltage measurements along the edge can probe the non-Abelian nature of thetrapped quasiparticles.Comment: 5 pages, 2 figue

physical review letters

“Wormhole” Geometry for Entrapping Topologically Protected Qubits in Non-Abelian Quantum Hall States and Probing Them with Voltage and Noise Measurements