articlePhysical Review LettersDec 16, 2015HYBRID OA

Significant-Loophole-Free Test of Bell’s Theorem with Entangled Photons

MGMarissa GiustinaMAMarijn A. M. VersteeghSWSören WengerowskyJHJohannes HandsteinerAHArmin Hochrainer

University of Vienna · Austrian Academy of Sciences · +8 more institutions

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Abstract

Local realism is the worldview in which physical properties of objects exist independently of measurement and where physical influences cannot travel faster than the speed of light. Bell's theorem states that this worldview is incompatible with the predictions of quantum mechanics, as is expressed in Bell's inequalities. Previous experiments convincingly supported the quantum predictions. Yet, every experiment requires assumptions that provide loopholes for a local realist explanation. Here, we report a Bell test that closes the most significant of these loopholes simultaneously. Using a well-optimized source of entangled photons, rapid setting generation, and highly efficient superconducting detectors, we…

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Topics & keywords

Topics
Keywords
  • Bell's theorem
  • Bell test experiments
  • Local hidden variable theory
  • Physics
  • Photon
  • Photon entanglement
  • Quantum nonlocality
  • Quantum entanglement
UN Sustainable Development Goals
  • Reduced inequalities
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