2013 Fiscal Year Final Research Report
Development of quantum communication system in photon-frequency basis using fiber optic components
| Project/Area Number |
23656044
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
FUKATSU SUSUMU 東京大学, 総合文化研究科, 教授 (60199164)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 量子通信 / 波長多重 / ファイバーコンポーネント / 周波数重ね合わせ状態 / 量子鍵配送 / 差動周波数シフト / 量子ゲート / 量子アルゴリズム |
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| Research Abstract |
A recent surge in demand for secure communication has spurred interest in developing a viable quantum communication protocol. Here it is demonstrated that the unprecedented frequency degree of freedom of light is rather suited for this purpose, as opposed to the many that call for specialty hardware to implement with. In fact, ubiquitous fiber optic components conveniently can provide its platform simply by introducing interference of the electric fields associated with the otherwise non-overlapping subbands of frequency(wavelength)-division multiplexing. An alternative quantum key distribution scheme is proposed and implemented by taking advantage of single photon interference in the time domain.
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