Coherent operations and screening in multielectron spin qubits

A.P. Higginbotham, F. Kuemmeth, M. Hanson, A. Gossard, C. Marcus, APS Physics, Physical Review Letters 112 (2014).


Journal Article | Published | English
Author
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Abstract
Multielectron spin qubits are demonstrated, and performance examined by comparing coherent exchange oscillations in coupled single-electron and multielectron quantum dots, measured in the same device. Fast (>1 GHz) exchange oscillations with a quality factor Q∼15 are found for the multielectron case, compared to Q∼2 for the single-electron case, the latter consistent with experiments in the literature. A model of dephasing that includes voltage and hyperfine noise is developed that is in good agreement with both single- and multielectron data, though in both cases additional exchange-independent dephasing is needed to obtain quantitative agreement across a broad parameter range.
Publishing Year
Date Published
2014-01-14
Journal Title
APS Physics, Physical Review Letters
Acknowledgement
The research is supported by the Intelligence Advanced Research Projects Activity (IARPA), through the Army Research Office Grant No. W911NF-12-1-0354, the DARPA QuEST Program, the Department of Energy, Office of Science, and the Danish National Research Foundation.
Volume
112
Issue
2
Article Number
026801
IST-REx-ID

Cite this

Higginbotham AP, Kuemmeth F, Hanson M, Gossard A, Marcus C. Coherent operations and screening in multielectron spin qubits. APS Physics, Physical Review Letters. 2014;112(2). doi:10.1103/PhysRevLett.112.026801
Higginbotham, A. P., Kuemmeth, F., Hanson, M., Gossard, A., & Marcus, C. (2014). Coherent operations and screening in multielectron spin qubits. APS Physics, Physical Review Letters, 112(2). https://doi.org/10.1103/PhysRevLett.112.026801
Higginbotham, Andrew P, Ferdinand Kuemmeth, Micah Hanson, Arthur Gossard, and Charles Marcus. “Coherent Operations and Screening in Multielectron Spin Qubits.” APS Physics, Physical Review Letters 112, no. 2 (2014). https://doi.org/10.1103/PhysRevLett.112.026801.
A. P. Higginbotham, F. Kuemmeth, M. Hanson, A. Gossard, and C. Marcus, “Coherent operations and screening in multielectron spin qubits,” APS Physics, Physical Review Letters, vol. 112, no. 2, 2014.
Higginbotham AP, Kuemmeth F, Hanson M, Gossard A, Marcus C. 2014. Coherent operations and screening in multielectron spin qubits. APS Physics, Physical Review Letters. 112(2), 026801.
Higginbotham, Andrew P., et al. “Coherent Operations and Screening in Multielectron Spin Qubits.” APS Physics, Physical Review Letters, vol. 112, no. 2, 026801, American Physiological Society, 2014, doi:10.1103/PhysRevLett.112.026801.

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