A 24 km fiber-based discretely signaled continuous variable quantum key distribution system

Quyen Dinh Xuan; Zheshen Zhang; Paul L. Voss

A 24 km fiber-based discretely signaled continuous variable quantum key distribution system

Quantum Physics 2009-10-07 v1

Authors: Quyen Dinh Xuan , Zheshen Zhang , Paul L. Voss

Abstract

We report a continuous variable key distribution system that achieves a final secure key rate of 3.45 kb/sec over a distance of 24.2 km of optical fiber. The protocol uses discrete signaling and post-selection to improve reconciliation speed and quantifies security by means of quantum state tomography. Polarization multiplexing and a frequency translation scheme permit transmission of a continuous wave local oscillator and suppression of noise from guided acoustic wave Brillouin scattering by more than 27 dB.

Keywords

quantum key distribution frequency comb spectroscopy

Cite

@article{arxiv.0910.1042,
  title  = {A 24 km fiber-based discretely signaled continuous variable quantum key distribution system},
  author = {Quyen Dinh Xuan and Zheshen Zhang and Paul L. Voss},
  journal= {arXiv preprint arXiv:0910.1042},
  year   = {2009}
}

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