Harnessing the GaAs quantum dot nuclear spin bath for quantum control


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RIBEIRO, Hugo, Jason R. PETTA, Guido BURKARD, 2010. Harnessing the GaAs quantum dot nuclear spin bath for quantum control. In: Physical Review B. 82(11). ISSN 1098-0121

@article{Ribeiro2010Harne-12442, title={Harnessing the GaAs quantum dot nuclear spin bath for quantum control}, year={2010}, doi={10.1103/PhysRevB.82.115445}, number={11}, volume={82}, issn={1098-0121}, journal={Physical Review B}, author={Ribeiro, Hugo and Petta, Jason R. and Burkard, Guido} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/12442"> <dc:contributor>Ribeiro, Hugo</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-08T09:43:54Z</dcterms:available> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/12442"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-07-08T09:43:54Z</dc:date> <dc:creator>Petta, Jason R.</dc:creator> <dc:language>eng</dc:language> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dc:contributor>Burkard, Guido</dc:contributor> <dcterms:bibliographicCitation>Publ. in: Physical Review B 82 (2010), 11, 115445</dcterms:bibliographicCitation> <dcterms:title>Harnessing the GaAs quantum dot nuclear spin bath for quantum control</dcterms:title> <dc:creator>Ribeiro, Hugo</dc:creator> <dc:contributor>Petta, Jason R.</dc:contributor> <dcterms:issued>2010</dcterms:issued> <dc:creator>Burkard, Guido</dc:creator> <dcterms:abstract xml:lang="eng">We theoretically demonstrate that nuclear spins can be harnessed to coherently control two-electron spin states in a double quantum dot. Hyperfine interactions lead to an avoided crossing between the spin singlet state and the ms=+1 triplet state, T+. We show that a coherent superposition of singlet and triplet states can be achieved using finite-time Landau-Zener-Stückelberg interferometry. In this system the coherent rotation rate is set by the Zeeman energy, resulting in ∼1 ns single spin rotations. We analyze the coherence of this spin qubit by considering the coupling to the nuclear spin bath and show that T2∗∼16 ns, in good agreement with experimental data. Our analysis further demonstrates that efficient single qubit and two-qubit control can be achieved using Landau-Zener-Stückelberg interferometry.</dcterms:abstract> <dc:rights>deposit-license</dc:rights> </rdf:Description> </rdf:RDF>

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