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

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Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation. / Evers, E.; Kopteva, N. E.; Yugova, I. A.; Yakovlev, D. R.; Reuter, D.; Wieck, A. D.; Bayer, M.; Greilich, A.

In: npj Quantum Information, Vol. 7, No. 1, 60, 12.2021.

Research output: Contribution to journal › Article › peer-review

Author

Evers, E. ; Kopteva, N. E. ; Yugova, I. A. ; Yakovlev, D. R. ; Reuter, D. ; Wieck, A. D. ; Bayer, M. ; Greilich, A. / Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation. In: npj Quantum Information. 2021 ; Vol. 7, No. 1.

BibTeX

@article{2bd68c46b2bf4a7a824905b6a6bf1891,

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

abstract = "The 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.",

author = "E. Evers and Kopteva, {N. E.} and Yugova, {I. A.} and Yakovlev, {D. R.} and D. Reuter and Wieck, {A. D.} and M. Bayer and A. Greilich",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = dec,

doi = "10.1038/s41534-021-00395-1",

language = "English",

volume = "7",

journal = "npj Quantum Information",

issn = "2056-6387",

publisher = "Nature Publishing Group",

number = "1",

}

RIS

TY - JOUR

T1 - Suppression of nuclear spin fluctuations in an InGaAs quantum dot ensemble by GHz-pulsed optical excitation

AU - Evers, E.

AU - Kopteva, N. E.

AU - Yugova, I. A.

AU - Yakovlev, D. R.

AU - Reuter, D.

AU - Wieck, A. D.

AU - Bayer, M.

AU - Greilich, A.

PY - 2021/12

Y1 - 2021/12

N2 - The 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.

AB - The 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.

UR - http://www.scopus.com/inward/record.url?scp=85104523494&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/18d4671d-267e-39cd-9403-2956fb716516/

U2 - 10.1038/s41534-021-00395-1

DO - 10.1038/s41534-021-00395-1

M3 - Article

AN - SCOPUS:85104523494

VL - 7

JO - npj Quantum Information

JF - npj Quantum Information

SN - 2056-6387

IS - 1

M1 - 60

ER -

ID: 86057147