Ultrabright source of polarization-entangled photons

Kwiat, Paul G., Waks, Edo, White, Andrew G., Appelbaum, Ian and Eberhard, Philippe H. (1999) Ultrabright source of polarization-entangled photons. Physical Review a, 60 2: R773-R776. doi:10.1103/PhysRevA.60.R773

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Author Kwiat, Paul G.
Waks, Edo
White, Andrew G.
Appelbaum, Ian
Eberhard, Philippe H.
Title Ultrabright source of polarization-entangled photons
Journal name Physical Review a   Check publisher's open access policy
ISSN 1050-2947
Publication date 1999-08-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.60.R773
Open Access Status File (Publisher version)
Volume 60
Issue 2
Start page R773
End page R776
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract Using the process of spontaneous parametric down-conversion in a two-crystal geometry, we have generated a source of polarization-entangled photon pairs that is more than ten times brighter, per unit of pump power, than previous sources, with another factor of 30 to 75 expected to be readily achievable. We have measured a high level of entanglement between photons emitted over a relatively large collection angle, and over a 10-nm bandwidth. As a demonstration of the source capabilities, we obtained a 242-σ violation of Bell’s inequalities in less than three minutes, and observed near-perfect photon correlations when the collection efficiency was reduced. In addition, both the degree of entanglement and the state purity should be readily tunable.
Keyword Parametric Down-Conversion
Bell Inequalities
Experimental Realization
Local Realism
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 495 times in Thomson Reuters Web of Science Article | Citations
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