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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 9505–9513

Differential-phase-shift quantum key distribution using heralded narrow-band single photons

Chang Liu, Shanchao Zhang, Luwei Zhao, Peng Chen, C. -H. F. Fung, H. F. Chau, M. M. T. Loy, and Shengwang Du  »View Author Affiliations

Optics Express, Vol. 21, Issue 8, pp. 9505-9513 (2013)

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We demonstrate the first proof of principle differential phase shift (DPS) quantum key distribution (QKD) using narrow-band heralded single photons with amplitude-phase modulations. In the 3-pulse case, we obtain a quantum bit error rate (QBER) as low as 3.06% which meets the unconditional security requirement. As we increase the pulse number up to 15, the key creation efficiency approaches 93.4%, but with a cost of increasing the QBER. Our result suggests that narrow-band single photons maybe a promising source for the DPS-QKD protocol.

© 2013 OSA

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

Original Manuscript: February 11, 2013
Revised Manuscript: April 5, 2013
Manuscript Accepted: April 5, 2013
Published: April 10, 2013

Chang Liu, Shanchao Zhang, Luwei Zhao, Peng Chen, C. -H. F. Fung, H. F. Chau, M. M. T. Loy, and Shengwang Du, "Differential-phase-shift quantum key distribution using heralded narrow-band single photons," Opt. Express 21, 9505-9513 (2013)

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