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Originally posted by wanggc2939 at 2010-04-24 08:27:35:
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tongling921(½ð±Ò+1):3x 2010-04-24 22:52
New High-Intensity Source of Polarization-Entangled Photon Pairs
Phys. Rev. Lett. 75, 4337¨C4341 (1995)

We report on a high-intensity source of polarization-entangled photon pairs with high momentum definition. Type-II noncollinear phase matching in parametric down conversion produces true entanglement: No part of the wave function must be discarded, in contrast to previous schemes. With two-photon fringe visibilities in excess of 97%, we demonstrated a violation of Bell's inequality by over 100 standard deviations in less than 5 min. The new source allowed ready preparation of all four of the EPR-Bell states.

http://prl.aps.org/abstract/PRL/v75/i24/p4337_1
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