Quantum Effects Discovered in High-Energy Particle Collisions by CMS Team

The CMS collaboration has uncovered new quantum effects in high-energy particle collisions. Their study reveals quantum correlations in top quark pairs, where classical physics would predict none. These findings offer fresh insights into the quantum properties of matter at extreme energies. Researchers observed discord, a basic form of quantum correlation, with a significance exceeding five standard deviations in multiple regions of phase space. This included areas corresponding to separable quantum states. They also detected magic, another observable linked to quantum correlations, with similar statistical strength.

Steerability, a more subtle type of quantum entanglement, was identified in the system with a significance above three standard deviations. However, no Bell correlation was found within the examined phase space, matching existing theoretical models.

The team quantified a hierarchy of quantum correlations in top quark-antiquark pairs. Discord appeared as the most fundamental, followed by entanglement, steerability, and the absence of Bell correlation. These results confirm quantum entanglement in such pairs for the first time. The discovery provides a new framework for interpreting collider data. It expands the understanding of quantum effects in high-energy systems. The CMS collaboration’s work opens further avenues for studying quantum properties in particle physics.