articleNatureMay 10, 2023HYBRID OA

Loophole-free Bell inequality violation with superconducting circuits

SSSimon StorzJSJosua SchärAKAnatoly KulikovPMPaul MagnardPKPhilipp Kurpiers

ETH Zurich · Alice Films (France) · +15 more institutions

PubMed
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Abstract

Abstract Superposition, entanglement and non-locality constitute fundamental features of quantum physics. The fact that quantum physics does not follow the principle of local causality 1–3 can be experimentally demonstrated in Bell tests 4 performed on pairs of spatially separated, entangled quantum systems. Although Bell tests, which are widely regarded as a litmus test of quantum physics, have been explored using a broad range of quantum systems over the past 50 years, only relatively recently have experiments free of so-called loopholes 5 succeeded. Such experiments have been performed with spins in nitrogen–vacancy centres 6 , optical photons 7–9 and neutral atoms 10 . Here we demonstrate a loophole-free…

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Topics & keywords

Topics
Keywords
  • Bell's theorem
  • Bell test experiments
  • Physics
  • Quantum entanglement
  • Quantum nonlocality
  • Quantum mechanics
  • Bell state
  • Quantum computer
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