Entanglement swapping in a Franson interferometer setup

Details Entanglement swapping in a Franson interferometer setup Entanglement swapping in a Franson interferometer setup

2007-06-18

arxiv.org/abs/0706.2550v2

Journal of Modern Optics 54, 2297-2306, (2007)

Physics

Quantum Physics

Published on the special issue of JMO in honour of the 60th birthday of Sir Peter Knight, FRS. Submitted to JMO on 10 February

Scientific paper

We propose a simple scheme to swap the non local correlations, characteristic of a Franson interferometric setup, between pairs of frequency entangled photons emitted by distinct non linear crystals in a parametric down conversion process. Our scheme consists of two distinct sources of frequency entangled photons. One photon of each pair is sent to a separate Mach - Zender interferometer while the other photons of the pairs are mixed by a beam splitter and then detected in a Ou - Mandel interferometer. For suitably postselected joint measuremetns, the photons sent at the Mach -Zender show a coincidence photocount statistics which depends non locally on the settings of the two interferometers.

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