2013 Fiscal Year Final Research Report
Spin amplification with a high gain
| Project/Area Number |
24740273
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Osaka University |
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Principal Investigator |
NEGORO Makoto 大阪大学, 基礎工学研究科, 助教 (70611549)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | スピン増幅（スピンアンプ） / 核磁気共鳴（NMR) / 動的核偏極（DNP) / 光励起三重項 / ペンタセン（pentacene） / p-ターフェニル（p-terphenyl） / ハミルトニアンエンジニアリング / スピン格子緩和（T1) |
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| Research Abstract |
We have demonstrated amplification of Ramsey spectroscopy signals with the gain of more than 10 at room temperature. Using dynamic nuclear polarization with photo-excited triplet electrons, we have achieved polarization of 34% at room temperature. These mean that the sensitivity enhancement of more than 100,000 will be capable with the combination of spin amplification and dynamic nuclear polarization. Using 1-13C-1-fluoro-p-terphenyl, we have implemented non-destructive spin amplification with the gain of 14. We have proposed a method to make a pulse for quantum gate with a high fidelity based on average Hamiltonian theory and optimal control theory. We have proposed a quantum circuit of regenerative spin amplification, which is scalable to a higher gain if the gate fidelity and the initial polarization are beyond thresholds.
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