Text
Quantum entanglement is one of the most intriguing phenomena of quantum physics, where the state of one particle is tied to the state of another, regardless of how far apart the particles are. This phenomenon has no analogue in classical physics. For the first time, quantum entanglement is observed at the LHC at CERN at the highest energy yet in the pair production of top quarks, the heaviest elementary particles, using correlations of their spins within the ATLAS experiment. This is just the beginning of further measurements of fundamental concepts of quantum physics at the LHC.
Artistic visualisation of top-quark entanglement.