0702090v1

related topics
{photon, photons, single}
{light, field, probe}
{state, phys, rev}
{bell, inequality, local}
{cos, sin, state}
{level, atom, field}
{time, decoherence, evolution}

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

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.

oai_identifier:
oai:arXiv.org:quant-ph/0702090
categories:
quant-ph
comments:
submitted for publication
arxiv_id:
quant-ph/0702090
journal_ref:
Optics Express Vol.15, No.16, 10182-10188 (2007)
created:
2007-02-09

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