New High-Intensity Source of Polarization-Entangled Photon Pairs - INSPIRE

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New High-Intensity Source of Polarization-Entangled Photon Pairs

Dec 11, 1995

Published in:

Phys.Rev.Lett. 75 (1995) 24, 4337

Published: Dec 11, 1995

DOI:

10.1103/PhysRevLett.75.4337

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Abstract: (APS)

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.

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