| Project/Area Number |
15K17477
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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 |
Optical engineering, Photon science
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| Research Institution | National Institute of Information and Communications Technology |
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Principal Investigator |
金 鋭博 国立研究開発法人情報通信研究機構, 未来ICT研究所・量子ICT先端開発センター, 研究員 (40647484)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Discontinued (Fiscal Year 2016)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | quantum optics / quantum information / nonlinear optics / entangled qudits / spectrally resolved / quantum interference |
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| Outline of Annual Research Achievements |
We have successfully completed the main task of our original plan in Fiscal Year (FY) 2015 and 2016. In FY2015, we constructed a fiber spectrometer to measure the spectrally resolved Hong-Ou-Mandel interference between independent photon sources (HOMI-IPS). This experiment not only can deepen our understanding of HOMI-IPS in frequency domain, but also provides an important tool to test the theoretical predictions of HOMI-IPS using spectrally engineered photon sources. This result was published in Optics Express in 2015. In FY2016, we successfully generated discrete frequency modes in a Hong-Ou-Mandel interference. These modes are equally distributed in the frequency domain, and thus have a kind of frequency comb structure, forming a type of high dimensional entangled state (qudit). This result (arXiv:1603.07887) has been submitted to some high-profile journal.
All of these experiments were done at 1.5 micrometer telecom wavelength, which is most suitable for long-haul optical communications. Therefore, our technology would enable us to enhance performances in optical-fiber-based quantum communication, e.g. quantum cryptography. Moreover, the distribution of distinct entangled frequency modes may also be useful for improving quantum metrology, quantum remote synchronization, as well as fundamental tests of stronger violation of local realism at the telecom wavelength.
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