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Phys. Rev. Lett. 100, 150404 (2008) [4 pages]

Bell Inequality Violation with Two Remote Atomic Qubits

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D. N. Matsukevich*, P. Maunz, D. L. Moehring†, S. Olmschenk, and C. Monroe
Department of Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland, 20742, USA

Received 14 January 2008; published 18 April 2008

We observe violation of a Bell inequality between the quantum states of two remote Yb+ ions separated by a distance of about 1 m with the detection loophole closed. The heralded entanglement of two ions is established via interference and joint detection of two emitted photons, whose polarization is entangled with each ion. The entanglement of remote qubits is also characterized by full quantum state tomography.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.150404
DOI:
10.1103/PhysRevLett.100.150404
PACS:
03.65.Ud, 03.67.Mn, 37.10.Ty, 42.50.Xa

*dmats@umd.edu

†Present address: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany.

 
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