Quantum entanglement is a mind-bending phenomenon in quantum physics where the state of one particle is tied to another, no matter the distance. Recently, the ATLAS collaboration observed quantum entanglement between top quarks at the highest energies ever seen at the Large Hadron Collider. This groundbreaking discovery, also confirmed by the CMS collaboration, opens new doors for exploring this phenomenon and testing the Standard Model of particle physics. By studying the spins of top quarks and their decay products, physicists were able to observe and measure this entanglement. This new perspective on quantum physics could potentially lead to discoveries beyond the current understanding of the field.
https://home.cern/news/press-release/physics/lhc-experiments-cern-observe-quantum-entanglement-highest-energy-yet