Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation

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dc.contributor.authorEvers, Eiko
dc.contributor.authorKopteva, Nataliia E.
dc.contributor.authorYugova, Irina A.
dc.contributor.authorYakovlev, Dmitri R.
dc.contributor.authorReuter, Dirk
dc.contributor.authorWieck, Andreas D.
dc.contributor.authorBayer, Manfred
dc.contributor.authorGreilich, Alex
dc.date.accessioned2021-12-02T14:44:42Z
dc.date.available2021-12-02T14:44:42Z
dc.date.issued2021-04-16
dc.description.abstractThe coherent electron spin dynamics of an ensemble of singly charged (In,Ga)As/GaAs quantum dots in a transverse magnetic field is driven by periodic optical excitation at 1 GHz repetition frequency. Despite the strong inhomogeneity of the electron g factor, the spectral spread of optical transitions, and the broad distribution of nuclear spin fluctuations, we are able to push the whole ensemble of excited spins into a single Larmor precession mode that is commensurate with the laser repetition frequency. Furthermore, we demonstrate that an optical detuning of the pump pulses from the probed optical transitions induces a directed dynamic nuclear polarization and leads to a discretization of the total magnetic field acting on the electron ensemble. Finally, we show that the highly periodic optical excitation can be used as universal tool for strongly reducing the nuclear spin fluctuations and preparation of a robust nuclear environment for subsequent manipulation of the electron spins, also at varying operation frequencies.en
dc.identifier.urihttp://hdl.handle.net/2003/40585
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-22454
dc.language.isoende
dc.relation.ispartofseriesnpj Quantum information;7
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectQuantum dotsen
dc.subjectQubitsen
dc.subjectSpintronicsen
dc.subject.ddc530
dc.titleSuppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitationen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationEvers, E., Kopteva, N.E., Yugova, I.A. et al. Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation. npj Quantum Inf 7, 60 (2021).de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1038/s41534-021-00395-1de

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