Robust Long-Distance Entanglement and a Loophole-Free Bell Test with Ions and Photons
- 12 September 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 91 (11), 110405
- https://doi.org/10.1103/physrevlett.91.110405
Abstract
Two trapped ions that are kilometers apart can be entangled by the joint detection of two photons, each coming from one of the ions, in a basis of entangled states. Such a detection is possible with linear optical elements. The use of two-photon interference allows entanglement distribution free of interferometric sensitivity to the path length of the photons. The present method of creating entangled ions also opens up the possibility of a loophole-free test of Bell’s inequalities.Keywords
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