A method for reaching detection efficiencies necessary for optical loophole-free Bell experiments

Mladen Pavicic

doi:10.1016/S0030-4018(97)00285-X

A method for reaching detection efficiencies necessary for optical loophole-free Bell experiments

Quantum Physics 2009-10-31 v1

Authors: Mladen Pavicic

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Abstract

A method for preparing a loophole-free four-photon Bell experiments which requires a detection efficiency of 67% is proposed. It enables realistic detection efficiencies of 75% at a visibility of 85%. Two type-II crystals each down convert one correlated photon pair and we entangle one photon from one pair with one photon from the other pair on a highly transparent beam splitter. The entanglement selects two other conjugate photons into a Bell state. Wide solid angles for the conjugate photons then enable us to collect close to 100% of them. The cases when both photon pairs come from only one of the two crystals are successfully taken into account. Hardy's equalities are discussed.

Keywords

quantum optics quantum entanglement optical imaging

Cite

@article{arxiv.quant-ph/9907039,
  title  = {A method for reaching detection efficiencies necessary for optical loophole-free Bell experiments},
  author = {Mladen Pavicic},
  journal= {arXiv preprint arXiv:quant-ph/9907039},
  year   = {2009}
}

Comments

RevTeX, 20 pages, 2figures, Author's URL http://m3k.grad.hr/pavicic

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