2012 Fiscal Year Final Research Report
Theory of quantum state control in photon-electron-nucleus coupled system
| Project/Area Number |
22540328
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kyoto Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | スピンエレクトロニクス / 量子エレクトロニクス / 量子コンピュータ / 量子ドット |
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| Research Abstract |
The nuclear spin polarization is realized optically in the system of Si:P and NV center in diamond but the perfect spin polarization is not yet achieved. Here we proposed an optical method to realize the perfect spin polarization of the nucleus in the general neutral donor system. First of all, the spin polarization of the donor electron can be realized optically through the spin-singlet donor-bound exciton state. Then the spin-triplet exciton state is optically excited and this state makes a transition to the spin-singlet exciton state thereby flipping the spin of the donor nucleus through the hyperfine interaction. This process is not based on the detailed balance and can achieve the perfect spin polarization of the nucleus by repetitive optical excitation
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