New High-Intensity Source of Polarization-Entangled Photon Pairs

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PhysRevLett754337.pdf (813.88 KB)

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https://link.aps.org/doi/10.1103/PhysRevLett.75.4337

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https://doi.org/10.1103/PhysRevLett.75.4337
 http://hdl.handle.net/11603/39912

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UMBC Physics Department
UMBC Faculty Collection

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Date

1995-12-11

Type of Work

journal articles
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Citation of Original Publication

Kwiat, Paul G., Klaus Mattle, Harald Weinfurter, Anton Zeilinger, Alexander V. Sergienko, and Yanhua Shih. “New High-Intensity Source of Polarization-Entangled Photon Pairs.” Physical Review Letters 75, no. 24 (1995): 4337–41. https://doi.org/10.1103/PhysRevLett.75.4337.

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©1995 American Physical Society

Subjects

UMBC Quantum Optics Laboratory

Abstract

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.