Coherent Control of a Single Electron Spin with Electric Fields

Manipulation of single spins is essential for spin-based quantum information processing. Electrical control instead of magnetic control is particularly appealing for this purpose, because electric fields are easy to generate locally on-chip. We experimentally realized coherent control of a single-el...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2007-11, Vol.318 (5855), p.1430-1433
Main Authors: Nowack, K.C, Koppens, F.H.L, Nazarov, Yu.V, Vandersypen, L.M.K
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Coherence
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Data processing
Electric current
Electric fields
Electric potential
Electron spin
Electronic transport in condensed matter
Electrons
Exact sciences and technology
Magnetic fields
Microwave resonance
Microwaves
Nanocomposites
Nanomaterials
Nanostructure
Nanotechnology
Oscillations
Physics
Quantum computation
Quantum dots
Quantum information
Qubits (quantum computing)
Spin orbit interactions
Spin polarized transport
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Summary:Manipulation of single spins is essential for spin-based quantum information processing. Electrical control instead of magnetic control is particularly appealing for this purpose, because electric fields are easy to generate locally on-chip. We experimentally realized coherent control of a single-electron spin in a quantum dot using an oscillating electric field generated by a local gate. The electric field induced coherent transitions (Rabi oscillations) between spin-up and spin-down with 90° rotations as fast as ~55 nanoseconds. Our analysis indicated that the electrically induced spin transitions were mediated by the spin-orbit interaction. Taken together with the recently demonstrated coherent exchange of two neighboring spins, our results establish the feasibility of fully electrical manipulation of spin qubits.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1148092