2013 Fiscal Year Final Research Report
Coherent transfer in single photon and single electron spin coupled systems
| Project/Area Number |
21244046
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OIWA Akira 東京大学, 工学(系)研究科(研究院), 講師 (10321902)
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| Co-Investigator(Kenkyū-buntansha) |
TARUCHA Seigo 東京大学, 大学院工学系研究科, 教授 (40302799)
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| Co-Investigator(Renkei-kenkyūsha) |
HIRAKAWA Kazuhiko 東京大学, 生産技術研究所, 教授 (10183097)
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| Project Period (FY) |
2009-04-01 – 2014-03-31
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| Keywords | 半導体 / 量子ドット / 量子情報技術 / 光子－スピン量子インターフェース / 回路量子電気力学 |
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| Research Abstract |
In this project, we have studied the coherent transfer from single photons to single electron spins in quantum dots towards constructing global quantum network and application to the quantum repeater enabling long distance communication. First, we have fabricated quantum dots using quantum well structures designed by obeying the theoretical proposal and characterized the g-factor of these quantum dots. Then, we have found that the quantum dots that satisfy the coherent transfer condition have been realized. In these quantum dots, we have demonstrated the single photoelectron detection using resonant interdot tunneling and significant improvement in the detection reliability. Moreover, by combining this single photon detection scheme to the Pauli rule in two electron system, we have successfully realized the detection of single photoelectron spin with high distinguishability more than 90%. These achievements offer great steps towards coherent transfer.
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[Presentation]2013
Author(s)
A. Oiwa, Y. Kanai, R. S. Deacon, S. Takahashi, K.Yoshida, K. Shibata, K. Hirakawa, and S. Tarucha
Organizer
The 7th International Conference on Quantum Dots (QD2012)
Place of Presentation
Santa Fe, USA
Year and Date
20130513-18
Invited
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