Quantum pions

Abstract

We show that two- and three-pion states produced in the decay of neutral kaons are contextual, entangled, and Bell nonlocal in isospin space. By reinterpreting the experimental values of the different isospin amplitudes, we can determine the amount of entanglement enjoyed by these states and the extent to which they violate the non-contextuality and Bell locality inequalities. Notably, the three-pion state offers a genuine multipartite test of Bell nonlocality with qutrits.

5 pages, 2 figures

References in corpus (12)

• Quantum entanglement
• Kaon Decays in the Standard Model
• Measure of genuine multipartite entanglement with computable lower bounds
• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Bell-type inequalities for partial separability in N-particle systems and quantum mechanical violations
• Entanglement Suppression and Emergent Symmetries of Strong Interactions
• A Triangle Governs Genuine Tripartite Entanglement
• Bose-Einstein and Fermi-Dirac Interferometry in Particle Physics
• $K\to 3\pi$ Decays in Chiral Perturbation Theory
• Minimal Entanglement and Emergent Symmetries in Low-energy QCD
• Concurrence triangle induced genuine multipartite entanglement measure
• Entanglement in flavored scalar scattering