We describe a simple and efficient scheme for the readout of a tunable flux qubit, and present preliminary experimental tests for the preparation, manipulation and final readout of the qubit state, performed in the incoherent regime at liquid helium temperature. The tunable flux qubit is realized by a double SQUID with an extra Josephson junction inserted in the large superconducting loop, and the readout is performed by applying a current ramp to the junction and recording the value for which there is a voltage response, depending on the qubit state. This preliminary work indicates the feasibility and efficiency of the scheme.

Superconducting tunable flux qubit with direct readout scheme / Fabio, Chiarello; Pasquale, Carelli; Maria Gabriella, Castellano; Cosmelli, Carlo; Lorenzo, Gangemi; Roberto, Leoni; Stefano, Poletto; Daniela, Simeone; Guido, Torrioli. - In: SUPERCONDUCTOR SCIENCE & TECHNOLOGY. - ISSN 0953-2048. - 18:10(2005), pp. 1370-1373. [10.1088/0953-2048/18/10/021]

Superconducting tunable flux qubit with direct readout scheme

COSMELLI, Carlo;
2005

Abstract

We describe a simple and efficient scheme for the readout of a tunable flux qubit, and present preliminary experimental tests for the preparation, manipulation and final readout of the qubit state, performed in the incoherent regime at liquid helium temperature. The tunable flux qubit is realized by a double SQUID with an extra Josephson junction inserted in the large superconducting loop, and the readout is performed by applying a current ramp to the junction and recording the value for which there is a voltage response, depending on the qubit state. This preliminary work indicates the feasibility and efficiency of the scheme.
2005
01 Pubblicazione su rivista::01a Articolo in rivista
Superconducting tunable flux qubit with direct readout scheme / Fabio, Chiarello; Pasquale, Carelli; Maria Gabriella, Castellano; Cosmelli, Carlo; Lorenzo, Gangemi; Roberto, Leoni; Stefano, Poletto; Daniela, Simeone; Guido, Torrioli. - In: SUPERCONDUCTOR SCIENCE & TECHNOLOGY. - ISSN 0953-2048. - 18:10(2005), pp. 1370-1373. [10.1088/0953-2048/18/10/021]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/232853
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