Interference of overlap-free entangled photons with a Mach-Zehnder-like interferometer

Details Interference of overlap-free entangled photons with a Mach-Zehnder-like interferometer Interference of overlap-free entangled photons with a Mach-Zehnder-like interferometer

2010-05-05

arxiv.org/abs/1005.0802v1

Physics

Quantum Physics

8 pages, 3 figures, Submitted to New Journal of Physics (under review)

Scientific paper

Using spontaneous parametric down conversion and a 50:50 beam splitter, we generate coaxial polarization-entangled photon pairs, of which the two photons are far separated from each other. The photons are then sent one by one through one port of a modified Mach-Zehnder interferometer. We observe interference fringes with a periodicity half of the single-photon wavelength, independent of the distance between the photons. This feature can find applications in quantum-enhanced measurement.

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