2010 Fiscal Year Final Research Report
Quantum information processing based on complementarity in quantum mechanics
| Project/Area Number |
20540389
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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 |
Atomic/Molecular/Quantum electronics
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| Research Institution | Osaka University |
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Principal Investigator |
KOASHI Masato Osaka University, 大学院・基礎工学研究科, 准教授 (90322099)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 相補性 / 量子暗号 / 量子鍵配送 / 量子もつれ |
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| Research Abstract |
Theory on the security of quantum key distribution (QKD) protocols based on complementarity in quantum mechanics has been developed. This method is applicable to any QKD protocols in principle. Security proofs were provided for several QKD protocols with practical devices. Quantitative relations among various properties of quantum origin (quantum entanglement, private communication, and complementarity) were revealed through derivation of universal equations connecting the measures of quantum correlation defined operationally in terms of those properties.
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