Charge-state conditional operation of a spin qubit.

van Weperen, I; Armstrong, B D; Laird, E A; Medford, J; Marcus, C M; Hanson, M P; Gossard, A C

van Weperen, I; Armstrong, B D; Laird, E A; Medford, J; Marcus, C M; Hanson, M P; Gossard, A C.

Afiliación

van Weperen I; Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.

Phys Rev Lett ; 107(3): 030506, 2011 Jul 15.

Article en En | MEDLINE | ID: mdl-21838342

RESUMEN

We report coherent operation of a singlet-triplet qubit controlled by the spatial arrangement of two confined electrons in an adjacent double quantum dot that is electrostatically coupled to the qubit. This four-dot system is the specific device geometry needed for two-qubit operations of a two-electron spin qubit. We extract the strength of the capacitive coupling between qubit and adjacent double quantum dot and show that the present geometry allows fast conditional gate operation, opening pathways toward implementation of a universal set of gates for singlet-triplet spin qubits.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2011 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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