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Experimental Passive Round-Robin Differential Phase-Shift Quantum Key Distribution
- Publication Year :
- 2015
-
Abstract
- In quantum key distribution (QKD), the bit error rate is used to estimate the information leakage and hence determines the amount of privacy amplification --- making the final key private by shortening the key. In general, there exists a threshold of the error rate for each scheme, above which no secure key can be generated. This threshold puts a restriction on the environment noises. For example, a widely used QKD protocol --- BB84 --- cannot tolerate error rates beyond 25%. A new protocol, round-robin differential phase shifted (RRDPS) QKD, essentially removes this restriction and can in principle tolerate more environment disturbance. Here, we propose and experimentally demonstrate a passive RRDPS QKD scheme. In particular, our 500 MHz passive RRDPS QKD system is able to generate a secure key over 50 km with a bit error rate as high as 29%. This scheme should find its applications in noisy environment conditions.<br />5 pages, 3 figures
- Subjects :
- Quantum Physics
Computer science
General Physics and Astronomy
Word error rate
FOS: Physical sciences
Quantum key distribution
Quantum cryptography
Control theory
Information leakage
Bit error rate
Key (cryptography)
Differential (infinitesimal)
Quantum information science
Quantum Physics (quant-ph)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....9279b59ad19948ec874928bc638e8a66