Bell-Inequality Violation with a Triggered Photon-Pair Source

Young, R. J. and Stevenson, R. M. and Hudson, A. J. and Nicoll, C. A. and Ritchie, D. A. and Shields, A. J. (2009) Bell-Inequality Violation with a Triggered Photon-Pair Source. Physical review letters, 102 (3). -. ISSN 0031-9007

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Here we demonstrate, for the first time, violation of Bell's inequality using a triggered quantum dot photon-pair source without post-selection. Furthermore, the fidelity to the expected Bell state is increased above 90% using temporal gating to reject photons emitted at times when collection of uncorrelated light is more probable. A direct measurement of a CHSH Bell inequality is made showing a clear violation, highlighting that a quantum dot entangled photon source is suitable for communication exploiting nonlocal quantum correlations.

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Journal Article
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Physical review letters
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07 Jun 2012 10:37
Last Modified:
21 Nov 2022 22:22