DOI: 10.1126/science.1128215. Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots

Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots

10.1126/science.1128215

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

The fast dephasing of electron spins in an ensemble of quantum dots is detrimental for applications in quantum information processing. We show here that dephasing can be overcome by using a periodic train of light pulses to synchronize the phases of the precessing spins, and we demonstrate this effect in an ensemble of singly charged (In,Ga)As/GaAs quantum dots. This mode locking leads to constructive interference of contributions to Faraday rotation and presents potential applications based on robust quantum coherence within an ensemble of dots.

Bibliography

Greilich, A., Yakovlev, D. R., Shabaev, A., Efros, Al. L., Yugova, I. A., Oulton, R., Stavarache, V., Reuter, D., Wieck, A., & Bayer, M. (2006). Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots. Science, 313(5785), 341â345.

Authors 10

A. Greilich (first)
D. R. Yakovlev (additional)
A. Shabaev (additional)
Al. L. Efros (additional)
I. A. Yugova (additional)
R. Oulton (additional)
V. Stavarache (additional)
D. Reuter (additional)
A. Wieck (additional)
M. Bayer (additional)

References 20 Referenced 399

10.1103/PhysRevA.57.120
10.1103/PhysRevLett.83.4204
D. D. Awschalom D. Loss N. Samarth Eds. Semiconductor Spintronics and Quantum Computation (Springer-Verlag Heidelberg 2002). (10.1007/978-3-662-05003-3)
10.1126/science.1065389
10.1103/PhysRevLett.94.227403
10.1103/PhysRevLett.94.047402
10.1103/PhysRevLett.94.116601
10.1126/science.1116955
10.1103/PhysRevB.70.195340
10.1038/nature02693
10.1038/nature03008
10.1103/PhysRevB.65.205309
10.1103/PhysRevLett.88.186802
C. P. Slichter Principles of Magnetic Resonance (Springer-Verlag Berlin 1996).
10.1103/PhysRevB.73.045323
10.1103/PhysRevLett.96.227401
10.1103/PhysRevB.68.201305
10.1103/PhysRevB.73.045307
We chose a Lorentzian profile for the QD precession frequencies in the consideration because it leads to the closed form for S̄ z ( t ) in Eq. Generally our numerical calculations do not show any qualitative or quantitative differences for either the Gaussian or the Lorentzian profiles as long as the distribution ρ(ω e ) is smoothly going to zero on the scale of its width.
We are grateful to S. Erwin for his critical suggestions on the manuscript. This work was supported by the Bundesministerium für Bildung und Forschung program nanoquit the Defense Advanced Research Projects Agency program QuIST the Office of Naval Research and the Deutsche Forschungsgemeinschaft (Forschergruppe Quantum Optics in Semiconductor Nanostructures). R. O. thanks the Alexander von Humboldt foundation.

Dates

Type	When
Created	19 years, 1 month ago (July 20, 2006, 5:12 p.m.)
Deposited	1 year, 7 months ago (Jan. 9, 2024, 11:16 p.m.)
Indexed	1 day, 13 hours ago (Aug. 31, 2025, 6:16 a.m.)
Issued	19 years, 1 month ago (July 21, 2006)
Published	19 years, 1 month ago (July 21, 2006)
Published Print	19 years, 1 month ago (July 21, 2006)

Funders 0

None

BibTeX

@article{Greilich_2006, title={Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots}, volume={313}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1128215}, DOI={10.1126/science.1128215}, number={5785}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Greilich, A. and Yakovlev, D. R. and Shabaev, A. and Efros, Al. L. and Yugova, I. A. and Oulton, R. and Stavarache, V. and Reuter, D. and Wieck, A. and Bayer, M.}, year={2006}, month=jul, pages={341–345} }

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