High fidelity entanglement swapping at telecommunication wavelength using single-photon detectors based on compound semiconductors
| Project/Area Number |
23760053
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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 |
Applied optics/Quantum optical engineering
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 量子もつれ交換 / 単一光子検出 / 通信波長帯 |
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| Research Abstract |
Entanglement swapping experiment was carried out using spatially separated, polarization entangled photon sources at 1550 nm. In this experiment, we employed sinusoidally gated InGaAs/InP avalanche photodiodes which achieve high repetition frequencies and low dark counts. The high-performance single-photon detectors enable us to obtain ~ 0.9 of a fidelity of the entanglement swapping. The high-fidelity entanglement swapping will be able to be applied to the quantum key distribution over an optical fiber network.
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Report
(3 results)
Research Products
(16 results)
