Quantum dot arrays provide a promising platform for quantum information processing. For universal quantum simulation and computation, one central issue is to demonstrate the exhaustive controllability of quantum states. Here, we report the addressable manipulation of three single electron spins in a triple quantum dot using a technique combining electron-spin-resonance and a micro-magnet. The micro-magnet makes the local Zeeman field difference between neighboring spins much larger than the nuclear field fluctuation, which ensures the addressable driving of electron-spin-resonance by shifting the resonance condition for each spin. We observe distinct coherent Rabi oscillations for three spins in a semiconductor triple quantum dot with up to 25 MHz spin rotation frequencies. This individual manipulation over three spins enables us to arbitrarily change the magnetic spin quantum number of the three spin system, and thus to operate a triple-dot device as a three-qubit system in combination with the existing technique of exchange operations among three spins.
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11 April 2016
Research Article|
April 11 2016
Coherent electron-spin-resonance manipulation of three individual spins in a triple quantum dot
A. Noiri;
A. Noiri
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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J. Yoneda;
J. Yoneda
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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T. Nakajima;
T. Nakajima
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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T. Otsuka;
T. Otsuka
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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M. R. Delbecq;
M. R. Delbecq
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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K. Takeda;
K. Takeda
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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S. Amaha;
S. Amaha
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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G. Allison;
G. Allison
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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A. Ludwig
;
A. Ludwig
3Lehrstuhl für Angewandte Festkörperphysik,
Ruhr-Universität Bochum
, D-44780 Bochum, Germany
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A. D. Wieck
;
A. D. Wieck
3Lehrstuhl für Angewandte Festkörperphysik,
Ruhr-Universität Bochum
, D-44780 Bochum, Germany
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S. Tarucha
S. Tarucha
1Department of Applied Physics,
University of Tokyo
, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2RIKEN,
Center for Emergent Matter Science (CEMS)
, Wako-shi, Saitama 351-0198, Japan
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Appl. Phys. Lett. 108, 153101 (2016)
Article history
Received:
December 08 2015
Accepted:
March 11 2016
Citation
A. Noiri, J. Yoneda, T. Nakajima, T. Otsuka, M. R. Delbecq, K. Takeda, S. Amaha, G. Allison, A. Ludwig, A. D. Wieck, S. Tarucha; Coherent electron-spin-resonance manipulation of three individual spins in a triple quantum dot. Appl. Phys. Lett. 11 April 2016; 108 (15): 153101. https://doi.org/10.1063/1.4945592
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