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. 
H. de Riedmatten, I. Marcikic, W. Tittel, H. Zbinden and N. Gisin