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, since electric fields are easy to generate locally on-chip. We experimentally realize coherent control of a single elect...

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Bibliographic Details
Published inarXiv.org
Main Authors Nowack, K C, Koppens, F H L, Nazarov, Yu V, Vandersypen, L M K
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.03.2008
Subjects
Coherence
Data processing
Electric fields
Electron spin
Electrons
Magnetic control
Physics - Mesoscale and Nanoscale Physics
Quantum dots
Quantum phenomena
Qubits (quantum computing)
Single electrons
Spin-orbit interactions
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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, since electric fields are easy to generate locally on-chip. We experimentally realize coherent control of a single electron spin in a quantum dot using an oscillating electric field generated by a local gate. The electric field induces coherent transitions (Rabi oscillations) between spin-up and spin-down with pi/2 rotations as fast as ~55ns. Our analysis indicates that the electrically-induced spin transitions are mediated by the spin-orbit interaction. Taken together with the recently demonstrated coherent exchange of two neighboring spins, our results demonstrate the feasibility of fully electrical manipulation of spin qubits.
ISSN:2331-8422
DOI:10.48550/arxiv.0707.3080