Coherent electron-phonon coupling in tailored quantum systems.
Identifieur interne : 001546 ( Main/Exploration ); précédent : 001545; suivant : 001547Coherent electron-phonon coupling in tailored quantum systems.
Auteurs : RBID : pubmed:21407205English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Arsenicals, Graphite, Indium.
- chemical , chemistry : Arsenicals, Graphite, Indium.
- analysis : Nanostructures.
- chemistry : Nanostructures.
- Acoustics, Electrons, Mathematical Computing, Nanotechnology, Nanowires, Particle Size, Quantum Dots, Temperature.
Abstract
The coupling between a two-level system and its environment leads to decoherence. Within the context of coherent manipulation of electronic or quasiparticle states in nanostructures, it is crucial to understand the sources of decoherence. Here we study the effect of electron-phonon coupling in a graphene and an InAs nanowire double quantum dot (DQD). Our measurements reveal oscillations of the DQD current periodic in energy detuning between the two levels. These periodic peaks are more pronounced in the nanowire than in graphene, and disappear when the temperature is increased. We attribute the oscillations to an interference effect between two alternative inelastic decay paths involving acoustic phonons present in these materials. This interpretation predicts the oscillations to wash out when temperature is increased, as observed experimentally.
DOI: 10.1038/ncomms1241
PubMed: 21407205
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Coherent electron-phonon coupling in tailored quantum systems.</title><author><name sortKey="Roulleau, P" uniqKey="Roulleau P">P Roulleau</name><affiliation wicri:level="1"><nlm:affiliation>Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland. roulleau@phys.ethz.ch</nlm:affiliation><country xml:lang="fr">Suisse</country><wicri:regionArea>Solid State Physics Laboratory, ETH Zurich, 8093 Zurich</wicri:regionArea></affiliation></author><author><name sortKey="Baer, S" uniqKey="Baer S">S Baer</name></author><author><name sortKey="Choi, T" uniqKey="Choi T">T Choi</name></author><author><name sortKey="Molitor, F" uniqKey="Molitor F">F Molitor</name></author><author><name sortKey="G Ttinger, J" uniqKey="G Ttinger J">J Güttinger</name></author><author><name sortKey="M Ller, T" uniqKey="M Ller T">T Müller</name></author><author><name sortKey="Dr Scher, S" uniqKey="Dr Scher S">S Dröscher</name></author><author><name sortKey="Ensslin, K" uniqKey="Ensslin K">K Ensslin</name></author><author><name sortKey="Ihn, T" uniqKey="Ihn T">T Ihn</name></author></titleStmt><publicationStmt><date when="2011">2011</date><idno type="doi">10.1038/ncomms1241</idno><idno type="RBID">pubmed:21407205</idno><idno type="pmid">21407205</idno><idno type="wicri:Area/Main/Corpus">001508</idno><idno type="wicri:Area/Main/Curation">001508</idno><idno type="wicri:Area/Main/Exploration">001546</idno></publicationStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acoustics</term><term>Arsenicals (analysis)</term><term>Arsenicals (chemistry)</term><term>Electrons</term><term>Graphite (analysis)</term><term>Graphite (chemistry)</term><term>Indium (analysis)</term><term>Indium (chemistry)</term><term>Mathematical Computing</term><term>Nanostructures (analysis)</term><term>Nanostructures (chemistry)</term><term>Nanotechnology</term><term>Nanowires</term><term>Particle Size</term><term>Quantum Dots</term><term>Temperature</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Arsenicals</term><term>Graphite</term><term>Indium</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Arsenicals</term><term>Graphite</term><term>Indium</term></keywords><keywords scheme="MESH" qualifier="analysis" xml:lang="en"><term>Nanostructures</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Nanostructures</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Acoustics</term><term>Electrons</term><term>Mathematical Computing</term><term>Nanotechnology</term><term>Nanowires</term><term>Particle Size</term><term>Quantum Dots</term><term>Temperature</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The coupling between a two-level system and its environment leads to decoherence. Within the context of coherent manipulation of electronic or quasiparticle states in nanostructures, it is crucial to understand the sources of decoherence. Here we study the effect of electron-phonon coupling in a graphene and an InAs nanowire double quantum dot (DQD). Our measurements reveal oscillations of the DQD current periodic in energy detuning between the two levels. These periodic peaks are more pronounced in the nanowire than in graphene, and disappear when the temperature is increased. We attribute the oscillations to an interference effect between two alternative inelastic decay paths involving acoustic phonons present in these materials. This interpretation predicts the oscillations to wash out when temperature is increased, as observed experimentally.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">21407205</PMID><DateCreated><Year>2011</Year><Month>03</Month><Day>16</Day></DateCreated><DateCompleted><Year>2011</Year><Month>08</Month><Day>01</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">2041-1723</ISSN><JournalIssue CitedMedium="Internet"><Volume>2</Volume><PubDate><Year>2011</Year></PubDate></JournalIssue><Title>Nature communications</Title><ISOAbbreviation>Nat Commun</ISOAbbreviation></Journal><ArticleTitle>Coherent electron-phonon coupling in tailored quantum systems.</ArticleTitle><Pagination><MedlinePgn>239</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1038/ncomms1241</ELocationID><Abstract><AbstractText>The coupling between a two-level system and its environment leads to decoherence. Within the context of coherent manipulation of electronic or quasiparticle states in nanostructures, it is crucial to understand the sources of decoherence. Here we study the effect of electron-phonon coupling in a graphene and an InAs nanowire double quantum dot (DQD). Our measurements reveal oscillations of the DQD current periodic in energy detuning between the two levels. These periodic peaks are more pronounced in the nanowire than in graphene, and disappear when the temperature is increased. We attribute the oscillations to an interference effect between two alternative inelastic decay paths involving acoustic phonons present in these materials. This interpretation predicts the oscillations to wash out when temperature is increased, as observed experimentally.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Roulleau</LastName><ForeName>P</ForeName><Initials>P</Initials><Affiliation>Solid State Physics Laboratory, ETH Zurich, 8093 Zurich, Switzerland. roulleau@phys.ethz.ch</Affiliation></Author><Author ValidYN="Y"><LastName>Baer</LastName><ForeName>S</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Choi</LastName><ForeName>T</ForeName><Initials>T</Initials></Author><Author ValidYN="Y"><LastName>Molitor</LastName><ForeName>F</ForeName><Initials>F</Initials></Author><Author ValidYN="Y"><LastName>Güttinger</LastName><ForeName>J</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Müller</LastName><ForeName>T</ForeName><Initials>T</Initials></Author><Author ValidYN="Y"><LastName>Dröscher</LastName><ForeName>S</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Ensslin</LastName><ForeName>K</ForeName><Initials>K</Initials></Author><Author ValidYN="Y"><LastName>Ihn</LastName><ForeName>T</ForeName><Initials>T</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Nat Commun</MedlineTA><NlmUniqueID>101528555</NlmUniqueID><ISSNLinking>2041-1723</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Arsenicals</NameOfSubstance></Chemical><Chemical><RegistryNumber>045A6V3VFX</RegistryNumber><NameOfSubstance>Indium</NameOfSubstance></Chemical><Chemical><RegistryNumber>1303-11-3</RegistryNumber><NameOfSubstance>indium arsenide</NameOfSubstance></Chemical><Chemical><RegistryNumber>7782-42-5</RegistryNumber><NameOfSubstance>Graphite</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N">Acoustics</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Arsenicals</DescriptorName><QualifierName MajorTopicYN="N">analysis</QualifierName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Electrons</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Graphite</DescriptorName><QualifierName MajorTopicYN="N">analysis</QualifierName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Indium</DescriptorName><QualifierName MajorTopicYN="N">analysis</QualifierName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Mathematical Computing</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Nanostructures</DescriptorName><QualifierName MajorTopicYN="N">analysis</QualifierName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Nanotechnology</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Nanowires</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Particle Size</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="Y">Quantum Dots</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Temperature</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2010</Year><Month>11</Month><Day>17</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2011</Year><Month>2</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>3</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>3</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>8</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pii">ncomms1241</ArticleId><ArticleId IdType="doi">10.1038/ncomms1241</ArticleId><ArticleId IdType="pubmed">21407205</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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