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Highly efficient heralding of entangled single photons

Published

Author(s)

Sven Ramelow, Alexandra Mech, Marissa Giustina, Simon Groeblacher, Witlef Wieczorek, Adriana Lita, Brice R. Calkins, Thomas Gerrits, Sae Woo Nam, Anton Zeilinger, Rupert Ursin

Abstract

Single photons are an important prerequisite for a broad spectrum of quantum optical applications. We experimentally demonstrate a heralded single-photon source based on spontaneous parametric down- conversion in collinear bulk optics, and fiber-coupled bolometric transition-edge sensors. Without correcting for background, losses, or detection inefficiencies, we measure an overall heralding efficiency of 83%. By violating a Bell inequality, we confirm the single-photon character and high- quality entanglement of our heralded single photons which, in combination with the high heralding efficiency, are a necessary ingredient for advanced quantum communication protocols such as one-sided device-independent quantum key distribution.
Citation
Optics Express
Volume
21
Issue
6

Keywords

transition edge sensors, single photon detection, photon heralding, Bell inequality

Citation

Ramelow, S. , Mech, A. , Giustina, M. , Groeblacher, S. , Wieczorek, W. , Lita, A. , Calkins, B. , Gerrits, T. , Nam, S. , Zeilinger, A. and Ursin, R. (2013), Highly efficient heralding of entangled single photons, Optics Express, [online], https://doi.org/10.1364/OE.21.006707 (Accessed May 27, 2024)

Issues

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Created March 10, 2013, Updated October 12, 2021