Electrically controlling single-spin qubits in a continuous microwave field

Large-scale quantum computers must be built upon quantum bits that are both highly coherent and locally controllable. We demonstrate the quantum control of the electron and the nuclear spin of a single (31)P atom in silicon, using a continuous microwave magnetic field together with nanoscale electro...

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Published inScience advances Vol. 1; no. 3; p. e1500022
Main Authors Laucht, Arne, Muhonen, Juha T, Mohiyaddin, Fahd A, Kalra, Rachpon, Dehollain, Juan P, Freer, Solomon, Hudson, Fay E, Veldhorst, Menno, Rahman, Rajib, Klimeck, Gerhard, Itoh, Kohei M, Jamieson, David N, McCallum, Jeffrey C, Dzurak, Andrew S, Morello, Andrea
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 01.04.2015
Subjects
Condensed Matter Physics
Physical Sciences
SciAdv r-articles
Local electrical control
Quantum computing
Single-atom spin qubits
Phosphorus donor
Silicon nanoelectronics
Magnetic resonance
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Summary:Large-scale quantum computers must be built upon quantum bits that are both highly coherent and locally controllable. We demonstrate the quantum control of the electron and the nuclear spin of a single (31)P atom in silicon, using a continuous microwave magnetic field together with nanoscale electrostatic gates. The qubits are tuned into resonance with the microwave field by a local change in electric field, which induces a Stark shift of the qubit energies. This method, known as A-gate control, preserves the excellent coherence times and gate fidelities of isolated spins, and can be extended to arbitrarily many qubits without requiring multiple microwave sources.
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ISSN:2375-2548
2375-2548
DOI:10.1126/sciadv.1500022