2010 Fiscal Year Final Research Report
Comparative study of systems of a single flux qubit and coupled flux qubits
| Project/Area Number |
20540312
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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 | Yokohama National University |
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Principal Investigator |
SHIMAZU Yoshihiro Yokohama National University, 工学研究院, 准教授 (70235612)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 量子ビット / ジョセフソン接合 / メゾスコピック系 / 量子計算 / 超伝導素子 |
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| Research Abstract |
A flux qubit system is a promising candidate for realization of a quantum computer. We investigated novel flux-qubit systems that had not been investigated. Some remarkable results were obtained experimentally for a double-loop four-Josephson-junction flux qubit, wherein the potential barrier height can be varied in situ via control flux, resulting in the tunability of the energy gap. We observed microwave resonances associated with the first, second, and third excited states. These quantum levels may allow novel applications.
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