Bell Inequality Violation with Two Remote Atomic Qubits

2008/01/14 by D. N. Matsukevich, Dzmitry Matsukevich, Peter Maunz +4 · 7 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.100.150404

published as Phys. Rev. Lett. 100, 150404 (2008) · 4 pages, 4 figures

arxiv created 2008/01/14 · openalex publication_date 2008/04/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

Citations

• Violation of Bell's inequality under strict Einstein locality conditions
• Quantum repeaters based on entanglement purification
• Manipulation and detection of a trappedYb+hyperfine qubit
• On the Einstein Podolsky Rosen paradox

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• Entanglement of distant atoms by projective measurement: the role of detection efficiency
• Proposal for a cumulant-based Bell test for mesoscopic junctions
• Quantum computing with trapped ions
• Using macroscopic entanglement to close the detection loophole in Bell-inequality tests
• Testing the speed of ‘spooky action at a distance’