Quantum interference between three two-spin states in a double quantum dot.

Studenikin, S A; Aers, G C; Granger, G; Gaudreau, L; Kam, A; Zawadzki, P; Wasilewski, Z R; Sachrajda, A S

Studenikin, S A; Aers, G C; Granger, G; Gaudreau, L; Kam, A; Zawadzki, P; Wasilewski, Z R; Sachrajda, A S.

Afiliación

Studenikin SA; Institute for Microstructural Sciences, National Research Council Canada, Ottawa, Ontario Canada K1A 0R6.

Phys Rev Lett ; 108(22): 226802, 2012 Jun 01.

Article en En | MEDLINE | ID: mdl-23003637

RESUMEN

Qubits based on the singlet (S) and the triplet (T(0), T(+)) states in double quantum dots have been demonstrated in separate experiments. It has been recently proposed theoretically that under certain conditions a quantum interference could occur from the interplay between these two qubit species. Here we report experiments and modeling that confirm these theoretical predictions and identify the conditions under which this interference occurs. Density matrix calculations show that the interference pattern manifests primarily via the occupation of the common singlet state. The S/T(0) qubit is found to have a much longer coherence time as compared to the S/T(+) qubit.

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Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2012 Tipo del documento: Article Pais de publicación: Estados Unidos

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