Long distance measurement-device-independent quantum key distribution with entangled photon sources

Journal Article · Mon Aug 05 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4817672· OSTI ID:22218208

Xu, Feihu; Qi, Bing; Liao, Zhongfa; Lo, Hoi-Kwong ^[1]

---

1. Centre for Quantum Information and Quantum Control, Departments of Physics and Electrical and Computer Engineering, University of Toronto, Toronto, Ontario M5S 3G4 (Canada)

We present a feasible method that can make quantum key distribution (QKD), both ultra-long-distance and immune, to all attacks in the detection system. This method is called measurement-device-independent QKD (MDI-QKD) with entangled photon sources in the middle. By proposing a model and simulating a QKD experiment, we find that MDI-QKD with one entangled photon source can tolerate 77 dB loss (367 km standard fiber) in the asymptotic limit and 60 dB loss (286 km standard fiber) in the finite-key case with state-of-the-art detectors. Our general model can also be applied to other non-QKD experiments involving entanglement and Bell state measurements.

• OSTI ID: 22218208
• Journal Information: Applied Physics Letters, Vol. 103, Issue 6; Other Information: (c) 2013 © 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMPTOTIC SOLUTIONS
DETECTION
DISTANCE
DISTRIBUTION
EQUIPMENT
FIBERS
LOSSES
PHOTONS
QUANTUM ENTANGLEMENT