Quantum Information in High-Energy Physics: a top subject

Abstract:As a work selected for the Frontiers of Science Award, we present in the Proceedings of the ICBS an overview of how the techniques from the field of Quantum Information (QI) can be implemented in High-Energy Physics (HEP), including also some novel insights. We focus on the paradigmatic case of the top quark, a drosophila of a relativistic qubit. We study the presence of entanglement, perhaps the most genuine feature of Quantum Mechanics, in top-antitop quark production in high-energy colliders such as the LHC. We also analyze our experimental proposal of a quantum tomography protocol for the top-antitop quark pair, eventually leading to the entanglement observations by the ATLAS and CMS collaborations, which constituted the highest-energy observations of entanglement ever. We discuss how the concepts and techniques developed in our work have effectively spawned an already vast and rich field of QI in HEP.

These proceedings are for the 2026 International Congress of Basic Science, where our work received the Frontiers of Science Award. 15 pages, 3 figures

arXiv:2610.00467 [hep-ph]

(or arXiv:2610.00467v1 [hep-ph] for this version)

https://doi.org/10.48550/arXiv.2610.00467 arXiv-issued DOI via DataCite (pending registration)