Phys. Rev. Lett. 91, 110405 (2003) [4 pages]Robust Long-Distance Entanglement and a Loophole-Free Bell Test with Ions and PhotonsReceived 4 March 2003; revised 16 June 2003; published 12 September 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.110405
DOI:
10.1103/PhysRevLett.91.110405
PACS:
03.65.Ud, 03.67.Hk, 42.50.Xa
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