Entanglement generation via phase-matched processes: different Bell states within the linewidth

G. Brida; M. V. Chekhova; M. Genovese; L. A. Krivitsky

Entanglement generation via phase-matched processes: different Bell states within the linewidth

Quantum Physics 2007-10-01 v1

Authors: G. Brida , M. V. Chekhova , M. Genovese , L. A. Krivitsky

Abstract

It is shown, theoretically and experimentally, that at any type-II spontaneous parametric down-conversion (SPDC) phase matching, the decoherence-free singlet Bell state is always present within the natural bandwidth and can be filtered out by a proper spectral selection. Instead of the frequency selection, one can perform time selection of the two-photon time amplitude at the output of a dispersive fibre. Applications to quantum communication are outlined.

Keywords

spontaneous parametric down-conversion quantum entanglement quantum optics and quantum information

Cite

@article{arxiv.quant-ph/0702090,
  title  = {Entanglement generation via phase-matched processes: different Bell states within the linewidth},
  author = {G. Brida and M. V. Chekhova and M. Genovese and L. A. Krivitsky},
  journal= {arXiv preprint arXiv:quant-ph/0702090},
  year   = {2007}
}

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