Long-distance distribution of time-bin entanglement generated in a cooled fiber

Hiroki Takesue

doi:10.1364/OE.14.003453

Long-distance distribution of time-bin entanglement generated in a cooled fiber

Quantum Physics 2009-11-11 v2

Authors: Hiroki Takesue

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Abstract

This paper reports the first demonstration of the generation and distribution of entangled photon pairs in the 1.5-um band using spontaneous four-wave mixing in a cooled fiber. Noise photons induced by spontaneous Raman scattering were suppressed by cooling a dispersion shifted fiber with liquid nitrogen, which resulted in a significant improvement in the visibility of two-photon interference. By using this scheme, time-bin entangled qubits were successfully distributed over 60 km of optical fiber with a visibility of 76%, which was obtained without removing accidental coincidences.

Keywords

time-bin entanglement spontaneous four-wave mixing cooled fiber spontaneous Raman scattering two-photon interference quantum distribution

Cite

@article{arxiv.quant-ph/0512163,
  title  = {Long-distance distribution of time-bin entanglement generated in a cooled fiber},
  author = {Hiroki Takesue},
  journal= {arXiv preprint arXiv:quant-ph/0512163},
  year   = {2009}
}

Comments

11 pages, 3 figures

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