Journal
PHYSICAL REVIEW A
Volume 93, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.93.042324
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Funding
- 10000-Plan of Shandong province (Taishan Scholars)
- National High-Tech Program of China [2011AA010800, 2011AA010803]
- NSFC [11474182, 11174177, 60725416]
- Key Research and Development Plan Project of ShanDong Province [2015GGX101035]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics Grant [KF201513]
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The relatively low key rate seems to be the major barrier to its practical use for the decoy-state measurement-device-independent quantum key distribution (MDI-QKD). We present a four-intensity protocol for the decoy-state MDI-QKD that hugely raises the key rate, especially in the case in which the total data size is not large. Also, calculations show that our method makes it possible for secure private communication with fresh keys generated from MDI-QKD with a delay time of only a few seconds.
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