Einstein’s “Spooky Action at a Distance” Between the Heaviest Particles at the Large Hadron Collider

Two decades after the first proof of photon entanglement, the ATLAS and CMS experiments have observed quantum entanglement between top quarks and their antiparticles at the Large Hadron Collider.

This breakthrough confirms entanglement at high energies and offers a new perspective on quantum mechanics. Meanwhile, the vast number of top quark pairs produced at the LHC allows for extensive studies, further bolstered by advanced machine learning techniques in measuring spin entanglement and systematic uncertainties.