Phys. Rev. A 57, 3229–3232 (1998)Experimental demonstration of quantum correlations over more than 10 kmReceived 21 July 1997; published in the issue dated May 1998 Energy and time entangled photons at a wavelength of 1310 nm are produced by parametric down-conversion in a KNbO3 crystal and are sent into all-fiber interferometers using a telecommunications fiber network. The two interferometers of this Franson-type test of the Bell inequality are located 10.9 km apart from one another. Two-photon fringe visibilities of up to 81.6% are obtained. These strong nonlocal correlations support the nonlocal predictions of quantum mechanics and provide evidence that entanglement between photons can be maintained over long distances. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.57.3229
DOI:
10.1103/PhysRevA.57.3229
PACS:
03.65.Bz, 42.50.-p
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.