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Time-Bin Phase-Encoding Measurement-Device-Independent Quantum Key Distribution with Four Single-Photon Detectors |
| Guang-Zhao Tang1, Shi-Hai Sun1**, Huan Chen1, Chun-Yan Li1, Lin-Mei Liang2** |
1College of Science, National University of Defense Technology, Changsha 410073
2State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073
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| Cite this article: |
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Guang-Zhao Tang, Shi-Hai Sun, Huan Chen et al 2016 Chin. Phys. Lett. 33 120301 |
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Abstract Measurement-device-independent quantum key distribution (MDI-QKD) eliminates all loopholes on detection. Previous experiments of time-bin phase-encoding MDI-QKD allow a factor of $\frac{3}{4}$ loss in the final key for the incapability of identifying two successive detection events by a single photon detector. Here we propose a new scheme to realize the time-bin phase-encoding MDI-QKD. The polarization states are used to generate the time bins and the phase-encoding states. The factor of loss in the final key is eliminated by using four single photon detectors at the measurement site. We show the feasibility of our scheme with a proof-of-principle experimental demonstration. The phase reference frame is rotated extremely slowly with only passive stabilization measures. The quantum bit error rate can reach 0.8% in the $Z$-basis and 26.2% in the $X$-basis.
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Received: 12 August 2016
Published: 29 December 2016
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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89.70.Cf
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(Entropy and other measures of information)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11304391, 11674397 and 61671455, and the Program for New Century Excellent Talents in University of China. |
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