The ATLAS Collaboration has recently made the first observation of quantum entanglement in top quark pair production. Since the Standard Model of particle physics is after all a quantum field theory, one might indeed expect such a fundamental feature of quantum mechanics to hold, almost trivially. So what’s all the fuss about? In this seminar, I will try to disentangle the technicalities of this measurement, to show how quantum information might help us in high energy particle physics, and vice-versa.
Looking forward, I will discuss the suitability of various top quark and Higgs boson production processes to further study quantum entanglement, the violation of Bell’s inequalities, as well as more subtle concepts from quantum information. Beyond larger datasets, these measurements would also benefit from the precise reconstruction of complex event topologies, which may only be possible with sophisticated machine learning algorithms. From precision measurements at the high energy frontier is now emerging a brand new sub-field, quantum information at the LHC.