Nondestructive readout for a superconducting flux qubit.

Lupascu, A; Verwijs, C J M; Schouten, R N; Harmans, C J P M; Mooij, J E

Lupascu, A; Verwijs, C J M; Schouten, R N; Harmans, C J P M; Mooij, J E.

Afiliación

Lupascu A; Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands.

Phys Rev Lett ; 93(17): 177006, 2004 Oct 22.

Article en En | MEDLINE | ID: mdl-15525116

RESUMEN

We present a new readout method for a superconducting flux qubit, based on the measurement of the Josephson inductance of a superconducting quantum interference device that is inductively coupled to the qubit. The intrinsic flux detection efficiency and backaction are suitable for a fast and nondestructive determination of the quantum state of the qubit, as needed for readout of multiple qubits in a quantum computer. We performed spectroscopy of a flux qubit and we measured relaxation times of the order of 80 micros.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2004 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos

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