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Spin–orbit qubit in a semiconductor nanowire

Nadj-Perge, S. and Frolov, S. M. and Bakkers, E. P. A. M. and Kouwenhoven, L. P. (2010) Spin–orbit qubit in a semiconductor nanowire. Nature, 468 (7327). pp. 1084-1087. ISSN 0028-0836. doi:10.1038/nature09682.

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Motion of electrons can influence their spins through a fundamental effect called spin–orbit interaction. This interaction provides a way to control spins electrically and thus lies at the foundation of spintronics. Even at the level of single electrons, the spin–orbit interaction has proven promising for coherent spin rotations. Here we implement a spin–orbit quantum bit (qubit) in an indium arsenide nanowire, where the spin–orbit interaction is so strong that spin and motion can no longer be separated. In this regime, we realize fast qubit rotations and universal single-qubit control using only electric fields; the qubits are hosted in single-electron quantum dots that are individually addressable. We enhance coherence by dynamically decoupling the qubits from the environment. Nanowires offer various advantages for quantum computing: they can serve as one-dimensional templates for scalable qubit registers, and it is possible to vary the material even during wire growth. Such flexibility can be used to design wires with suppressed decoherence and to push semiconductor qubit fidelities towards error correction levels. Furthermore, electrical dots can be integrated with optical dots in p–n junction nanowires. The coherence times achieved here are sufficient for the conversion of an electronic qubit into a photon, which can serve as a flying qubit for long-distance quantum communication.

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Nadj-Perge, S.0000-0002-2916-360X
Additional Information:© 2010 Macmillan Publishers Limited. Received 29 September; accepted 10 November 2010. We thank K. Nowack, R. Schouten, M. Laforest, K. Zuo, M. Hocevar, R. Algra, J. van Tilburg, M. Scheffler, G. de Lange, V. Dobrovitski, J. Danon, R. Hanson, R. Liu, Yu. V. Nazarov and L. Vandersypen for their help. This work has been supported by NWO/FOM (the Netherlands Organization for Scientific Research), an ERC Advanced Grant and through the DARPA program QUEST.
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:7327
Record Number:CaltechAUTHORS:20160113-085621870
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Official Citation:Spin–orbit qubit in a semiconductor nanowire S. Nadj-Perge, S. M. Frolov, E. P. A. M. Bakkers & L. P. Kouwenhoven Nature 468, 1084–1087 (23 December 2010) doi:10.1038/nature09682
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63619
Deposited By: Ruth Sustaita
Deposited On:13 Jan 2016 18:15
Last Modified:10 Nov 2021 23:19

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