Publikation:

Enhancement of electron spin coherence by optical preparation of nuclear spins

Vorschaubild

Dateien

0512362v1.pdf
0512362v1.pdfGröße: 224.61 KBDownloads: 157

Datum

2005

Autor:innen

Stepanenko, Dimitrije
Giedke, Geza
Imamoglu, Atac

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

URI (zitierfähiger Link)
http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-91155
DOI (zitierfähiger Link)
https://doi.org/10.1103/PhysRevLett.96.136401
ArXiv-ID
http://arxiv.org/abs/cond-mat/0512362

Internationale Patentnummer

Link zur Lizenz
Urheberrechtlich geschützt

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung
Open Access Green

Sammlungen

Physik: Publikationen
Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published

Erschienen in

Physical Review Letters. 2005, 96, 136401. Available under: doi: 10.1103/PhysRevLett.96.136401

Zusammenfassung

We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excitation and photon detection. When a pair of applied laser fields satisfy two-photon resonance between the two ground electronic spin states, detection of light scattering from the intermediate exciton state acts as a weak quantum measurement of the effective magnetic (Overhauser) field due to the nuclear spins. If the spin were driven into a coherent population trapping state where no light scattering takes place, then the nuclear state would be projected into an eigenstate of the Overhauser field operator and electron decoherence due to nuclear spins would be suppressed: we show that this limit can be approached by adapting the laser frequencies when a photon is detected. We use a Lindblad equation to describe the time evolution of the driven system under photon emission and detection. Numerically, we find an increase of the electron coherence time from 5 ns to 500 ns after a preparation time of 10 microseconds.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Overhauser effect, Semiconductor quantum dots, Light scattering, Excitons

Konferenz

Rezension
undefined / . - undefined, undefined

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige Datensätze in KOPS

Zitieren

ISO 690STEPANENKO, Dimitrije, Guido BURKARD, Geza GIEDKE, Atac IMAMOGLU, 2005. Enhancement of electron spin coherence by optical preparation of nuclear spins. In: Physical Review Letters. 2005, 96, 136401. Available under: doi: 10.1103/PhysRevLett.96.136401
BibTex
@article{Stepanenko2005Enhan-9465,
  year={2005},
  doi={10.1103/PhysRevLett.96.136401},
  title={Enhancement of electron spin coherence by optical preparation of nuclear spins},
  volume={96},
  journal={Physical Review Letters},
  author={Stepanenko, Dimitrije and Burkard, Guido and Giedke, Geza and Imamoglu, Atac},
  note={Article Number: 136401}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/9465">
    <dc:creator>Burkard, Guido</dc:creator>
    <dcterms:issued>2005</dcterms:issued>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9465/1/0512362v1.pdf"/>
    <dc:creator>Giedke, Geza</dc:creator>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9465/1/0512362v1.pdf"/>
    <dc:creator>Stepanenko, Dimitrije</dc:creator>
    <dc:creator>Imamoglu, Atac</dc:creator>
    <dc:contributor>Stepanenko, Dimitrije</dc:contributor>
    <dc:format>application/pdf</dc:format>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Burkard, Guido</dc:contributor>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9465"/>
    <dcterms:abstract xml:lang="eng">We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excitation and photon detection. When a pair of applied laser fields satisfy two-photon resonance between the two ground electronic spin states, detection of light scattering from the intermediate exciton state acts as a weak quantum measurement of the effective magnetic (Overhauser) field due to the nuclear spins. If the spin were driven into a coherent population trapping state where no light scattering takes place, then the nuclear state would be projected into an eigenstate of the Overhauser field operator and electron decoherence due to nuclear spins would be suppressed: we show that this limit can be approached by adapting the laser frequencies when a photon is detected. We use a Lindblad equation to describe the time evolution of the driven system under photon emission and detection. Numerically, we find an increase of the electron coherence time from 5 ns to 500 ns after a preparation time of 10 microseconds.</dcterms:abstract>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:57:11Z</dcterms:available>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:title>Enhancement of electron spin coherence by optical preparation of nuclear spins</dcterms:title>
    <dc:contributor>Imamoglu, Atac</dc:contributor>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:57:11Z</dc:date>
    <dcterms:bibliographicCitation>First publ. in: arXiv:cond-mat/0512362 [cond-mat.mes-hall], also publ. in: Physical Review Letters 96 (2006), 136401</dcterms:bibliographicCitation>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Giedke, Geza</dc:contributor>
    <dc:language>eng</dc:language>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
  </rdf:Description>
</rdf:RDF>

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt
URL der Originalveröffentl.

Prüfdatum der URL

Prüfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Nein
Begutachtet
Diese Publikation teilen