Biphoton interference with a quantum dot entangled light source

Details Biphoton interference with a quantum dot entangled light source Biphoton interference with a quantum dot entangled light source

2008-03-27

arxiv.org/abs/0803.3938v1

R. M. Stevenson et al., Optics Express 15, 6507 (2007)

Physics

Quantum Physics

Published with open access in Optics Express

Scientific paper

10.1364/OE.15.006507

We demonstrate optical interferometry beyond the limits imposed by the photon wavelength using 'triggered' entangled photon pairs from a semiconductor quantum dot. Interference fringes of the entangled biphoton state reveals a periodicity half of that obtained with the single photon, and much less than that of the pump laser. High fringe visibility indicates that biphoton interference is less sensitive to decoherence than interference of two sequential single photons. The results suggest that quantum interferometry may be possible using a semiconductor LED-like device.

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