Quantum interference with photon pairs created in spatially separated sources
Hugues de Riedmatten, I. Marcikic, Wolfgang Tittel, Hugo Zbinden, Nicolas Gisin · Physical Review A · 2003
We report on a quantum interference experiment to probe the coherence between two photons coming from nondegenerate 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 net 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.