Publication Date:
2017-08-01
Description:
Author(s): Filip K. Malinowski, Frederico Martins, Peter D. Nissen, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra, Charles M. Marcus, and Ferdinand Kuemmeth Spin states of a three-electron system can encode one quantum bit in such a way that universal qubit control by voltage pulses becomes possible. In this work, a triple-dot qubit is operated in a highly symmetric charge configuration, using resonant radio-frequency voltage pulses applied to one gate electrode. The authors show that careful symmetrization reduces the susceptibility of the qubit frequency to voltage fluctuations by more than an order of magnitude, compared to conventional triple-dot spin qubits. Combining voltage control with symmetric operating regimes may lead to multiqubit processors based on semiconducting spin qubits that at the same time alleviate decoherence due to electrical noise. [Phys. Rev. B 96, 045443] Published Mon Jul 31, 2017
Keywords:
Surface physics, nanoscale physics, low-dimensional systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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