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Flux qubit on mesoscopic nonsuperconducting ring

E. Zipper·M. Kurpas·M. Szelag·J. Dajka·M. Szopa
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Abstract

The possibility of making a flux qubit on nonsuperconducting mesoscopic ballistic quasi 1D ring is discussed. We showed that such ring can be effectively reduced to a two-state system with two external control parameters. The two states carry opposite persistent currents and are coupled by tunneling which leads to a quantum superposition of states. The qubit states can be manipulated by resonant microwave pulses. The flux state of the sample can be measured by a SQUID magnetometer. Two or more qubits can be coupled by the flux the circulating currents generate. The problem of decoherence is also discussed.

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E. Zipper, M. Kurpas, M. Szelag, J. Dajka, M. Szopa. 2006-09-06. Flux qubit on mesoscopic nonsuperconducting ring. https://doi.org/10.1103/physrevb.74.125426

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