4 research outputs found
Quantum interference with photon pairs created in spatially separated sources
We report on a quantum interference experiment to probe the coherence between
two photons coming from non degenerate photon pairs at telecom wavelength
created in spatially separated sources. The two photons are mixed on a beam
splitter and we observe a reduction of up to 84% in the coincidence count rate
when the photons are made indistinguishable. This experiment constitutes an
important step towards the realization of quantum teleportation and
entanglement swapping with independent sources.Comment: 5 pages, 2 figures, changes according to referee's comments,
discussions partly rewritte
Polarization Entangled W State using Parametric Down-Conversion
An experimental scheme for preparing a polarization entangled W states from
four photons emitted by parametric down-conversion is proposed. We consider two
different configurations and a method of improving the yield by using single
photon sources. In the proposed scheme, one uses only linear optical elements
and photon detectors, so that this scheme is feasible by current technologies.Comment: 4 pages, 3 figure