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Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots

Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots

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RANCIC, Marko J., Guido BURKARD, 2014. Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots

@unpublished{Rancic2014Inter-29143, title={Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots}, year={2014}, author={Rancic, Marko J. 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/123456789/29143"> <dc:creator>Rancic, Marko J.</dc:creator> <dc:creator>Burkard, Guido</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-21T06:31:24Z</dc:date> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/29143"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-21T06:31:24Z</dcterms:available> <dc:contributor>Rancic, Marko J.</dc:contributor> <dc:language>eng</dc:language> <dcterms:abstract xml:lang="eng">We theoretically study the interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in two-electron semiconductor double quantum dots near the singlet (S) - triplet (T+) anticrossing. The goal of the scheme under study is to extend the singlet (S) - triplet (T0) qubit decoherence time T∗2 by dynamically transferring the polarization from the electron spins to the nuclear spins. This polarization transfer is achieved by cycling the electron spins over the S−T+ anticrossing. Here, we investigate, both quantitatively and qualitatively, how this hyperfine mediated dynamical polarization transfer is influenced by the Rashba and Dresselhaus spin-orbit interaction. In addition to T∗2, we determine the singlet return probability Ps, a quantity that can be measured in experiments. Our results suggest that the spin-orbit interaction establishes a mechanism that can polarize the nuclear spins in the opposite direction compared to hyperfine mediated nuclear spin polarization. In materials with relatively strong spin-orbit coupling, this interplay of spin-orbit and hyperfine mediated nuclear spin polarizations prevents any notable increase of the S−T0 qubit decoherence time T∗2.</dcterms:abstract> <dc:contributor>Burkard, Guido</dc:contributor> <dcterms:issued>2014</dcterms:issued> <dcterms:title>Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots</dcterms:title> </rdf:Description> </rdf:RDF>

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