title: Complete quantum control of exciton qubits bound to isoelectronic centres.
abstract: In recent years, impressive demonstrations related to quantum information processing have been realized. The scalability of quantum interactions between arbitrary qubits within an array remains however a significant hurdle to the practical realization of a quantum computer. Among the proposed ideas to achieve fully scalable quantum processing, the use of photons is appealing because they can mediate long-range quantum interactions and could serve as buses to build quantum networks. Quantum dots or nitrogen-vacancy centres in diamond can be coupled to light, but the former system lacks optical homogeneity while the latter suffers from a low dipole moment, rendering their large-scale interconnection challenging. Here, through the complete quantum control of exciton qubits, we demonstrate that nitrogen isoelectronic centres in GaAs combine both the uniformity and predictability of atomic defects and the dipole moment of semiconductor quantum dots. This establishes isoelectronic centres as a promising platform for quantum information processing.
authors.affiliation: Département de génie physique, Polytechnique Montréal, 2900 boul. Edouard-Montpetit, Montréal, Canada H3C 3A7.
authors.forename: G
authors.initials: G
authors.lastname: Éthier-Majcher
authors.affiliation: Département de génie physique, Polytechnique Montréal, 2900 boul. Edouard-Montpetit, Montréal, Canada H3C 3A7.
authors.forename: P
authors.initials: P
authors.lastname: St-Jean
authors.affiliation: Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Boso
authors.affiliation: Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Tosi
authors.affiliation: Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185, USA.
authors.forename: J F
authors.initials: JF
authors.lastname: Klem
authors.affiliation: Département de génie physique, Polytechnique Montréal, 2900 boul. Edouard-Montpetit, Montréal, Canada H3C 3A7.
authors.forename: S
authors.initials: S
authors.lastname: Francoeur