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Science 3 July 2009:
Vol. 325. no. 5936, pp. 70 - 72
DOI: 10.1126/science.1173684
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Reports

A Coherent Single-Hole Spin in a Semiconductor

Daniel Brunner,1 Brian D. Gerardot,1 Paul A. Dalgarno,1 Gunter Wüst,1 Khaled Karrai,2 Nick G. Stoltz,3 Pierre M. Petroff,3 Richard J. Warburton1,4,*

Semiconductors have uniquely attractive properties for electronics and photonics. However, it has been difficult to find a highly coherent quantum state in a semiconductor for applications in quantum sensing and quantum information processing. We report coherent population trapping, an optical quantum interference effect, on a single hole. The results demonstrate that a hole spin in a quantum dot is highly coherent.

1 School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
2 Department für Physik der Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
3 Materials Department, University of California, Santa Barbara, CA 93106, USA.
4 Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland.

* To whom correspondence should be addressed. E-mail: r.j.warburton{at}hw.ac.uk

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Coherent Holes in a Semiconductor Quantum Dot.
M. H. Kolodrubetz and J. R. Petta (2009)
Science 325, 42-43
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Science. ISSN 0036-8075 (print), 1095-9203 (online)