Highly efficient heralding of entangled single photons

Author(s): S. Ramelow, A. Mech, M. Giustina, S. Gröblacher, W. Wieczorek, A. Lita, B. Calkins, T. Gerrits, S. Woo Nam, A. Zeilinger, R. Ursin

Journal: Optics Express

Volume: 21

Page(s): 6707-6717

Year: 2013

DOI Number: 10.1364/OE.21.006707

Link: Link to publication


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.

Note: http://arxiv.org/abs/1211.5059

File: Link to PDF

Ursin Group Ursin Group , Zeilinger Group