Modified E91 protocol demonstration with hybrid entanglement photon source

Mikio Fujiwara; Ken-ichiro Yoshino; Yoshihiro Nambu; Taro Yamashita; Shigehito Miki; Hirotaka Terai; Zhen Wang; Morio Toyoshima; Akihisa Tomita; Masahide Sasaki

doi:10.1364/OE.22.013616

Modified E91 protocol demonstration with hybrid entanglement photon source

Quantum Physics 2015-06-23 v1

Authors: Mikio Fujiwara , Ken-ichiro Yoshino , Yoshihiro Nambu , Taro Yamashita , Shigehito Miki , Hirotaka Terai , Zhen Wang , Morio Toyoshima , Akihisa Tomita , Masahide Sasaki

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Abstract

We report on an experimental demonstration of the modified Ekert 91 protocol of quantum key distribution using a hybrid entanglement source with two different degrees of freedoms, a 1550 nm time-bin qubit and 810 nm polarization qubit. The violation of the Clauser-Horne-Shimony-Holt inequality could be demonstrated for the entanglement between the polarization qubit in free space and the time-bin qubit through 20 km fiber transmission. The secure key rate in our system is estimated 70-150 bps.

Keywords

quantum key distribution quantum entanglement

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@article{arxiv.1501.05686,
  title  = {Modified E91 protocol demonstration with hybrid entanglement photon source},
  author = {Mikio Fujiwara and Ken-ichiro Yoshino and Yoshihiro Nambu and Taro Yamashita and Shigehito Miki and Hirotaka Terai and Zhen Wang and Morio Toyoshima and Akihisa Tomita and Masahide Sasaki},
  journal= {arXiv preprint arXiv:1501.05686},
  year   = {2015}
}

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9 pages, 4 figures

Modified E91 protocol demonstration with hybrid entanglement photon source

Abstract

Keywords

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