Single-photon interference experiment over 100 km for quantum cryptography system using a balanced gated-mode photon detector

Hideo Kosaka; Akihisa Tomita; Yoshihiro Nambu; Tadamasa Kimura; Kazuo Nakamura

Single-photon interference experiment over 100 km for quantum cryptography system using a balanced gated-mode photon detector

Quantum Physics 2007-05-23 v1

Authors: Hideo Kosaka , Akihisa Tomita , Yoshihiro Nambu , Tadamasa Kimura , Kazuo Nakamura

Abstract

We demonstrate single-photon interference over 100 km using a balanced gated-mode photon detector and a plug & play system for quantum key distribution. The visibility with 0.1 photon/pulse was more than 80% after 100 km transmission. This corresponds to the fidelity of a quantum cryptography system of more than 90% and a QBER of less than 10%, satisfying the security criteria.

Keywords

single-photon sources quantum key distribution quantum optics

Cite

@article{arxiv.quant-ph/0306066,
  title  = {Single-photon interference experiment over 100 km for quantum cryptography system using a balanced gated-mode photon detector},
  author = {Hideo Kosaka and Akihisa Tomita and Yoshihiro Nambu and Tadamasa Kimura and Kazuo Nakamura},
  journal= {arXiv preprint arXiv:quant-ph/0306066},
  year   = {2007}
}

Comments

Submitted to Electronics Letters on May 16, 2003

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