Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes

2016/11/30 by Wenjamin Rosenfeld, Daniel Burchardt, Robert Garthoff +4 · 6 citations
Computer Science · Medicine · Physics and Astronomy · #Bell test experiments #Bell's theorem #Biofield Effects and Biophysics #Closing (real estate) #Computer science #Event (particle physics) #Law #Locality #Machine learning #Philosophy #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum nonlocality #Spin (aerodynamics) #Statistical physics #Test (biology) #Theoretical physics #Value (mathematics) #quant-ph

paper · pdf · doi:10.1103/physrevlett.119.010402

published as Phys. Rev. Lett. 119, 010402 (2017) · 30 pages, 10 figures, supplemental material included

arxiv created 2017/06/16 · openalex publication_date 2017/07/06 · arxiv updated 2017/07/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

An experimental test of Bell's inequality allows ruling out any local-realistic description of nature by measuring correlations between distant systems. While such tests are conceptually simple, there are strict requirements concerning the detection efficiency of the involved measurements, as well as the enforcement of spacelike separation between the measurement events. Only very recently could both loopholes be closed simultaneously. Here we present a statistically significant, event-ready Bell test based on combining heralded entanglement of atoms separated by 398 m with fast and efficient measurements of the atomic spin states closing essential loopholes. We obtain a violation with S=2.221±0.033 (compared to the maximal value of 2 achievable with models based on local hidden variables) which allows us to refute the hypothesis of local realism with a significance level P<2.57×10^-9.

Citations

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• On the Einstein Podolsky Rosen paradox
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• Bell nonlocality

Cited by

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• Quantum Randomness Generation by Probability Estimation with Classical Side Information
• Quantum Correlations in Classical Systems
• Quantum Entanglement Autodistillation in Baryon Pair Decays
• Physics and Metaphysics of Wigner’s Friends: Even Performed Premeasurements Have No Results
• Secure quantum key distribution with realistic devices

Related

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Significant-loophole-free test of Bell's theorem with entangled photons
• Addressing Local Realism through Bell Tests at Colliders
• A strong loophole-free test of local realism
• Experimental test of local realism using non-maximally entangled states