Polarization-based plug-and-play measurement-device-independent quantum key distribution
- South China Normal University, Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering (China)
- South China Normal University, South China Academy of Advanced Optoelectronics (China)
Measurement-device-independent quantum key distribution (MDI-QKD) has received much attention, with the goal of overcoming all of the security loopholes caused by an imperfect detection system. We here propose a plug-and-play MDI-QKD (P&P MDI-QKD) scheme whereby an untrusted relay node, Charlie, owns a laser and sends photons to Alice and Bob. Alice (Bob) modulates the polarization of the incident photons and returns them to Charlie. Charlie uses a modified Bell state analyzer (BSA) to perform Bell state measurements (BSM). In comparison with the original version of MDI-QKD, our scheme exploits a single untrusted laser as the photon source. This makes the signal photons identical and enhances the Hong-Ou-Mandel effect. Second, because of the P&P structure, the setup can automatically eliminate the birefringence influence of the fibers, which makes the setup highly stable. Finally, our modified BSA can identify |Φ〉{sup +} and |Φ〉{sup −} of four Bell states with polarization encoding but not |Ψ〉{sup +} and |Ψ〉{sup −}. Based on practical experimental parameters, a simulation showed that the maximum theoretical secure transmission distance could reach more 280 km.
- OSTI ID:
- 22950436
- Journal Information:
- Optical and Quantum Electronics, Vol. 51, Issue 1; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 0306-8919
- Country of Publication:
- United States
- Language:
- English
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