Quantum entanglement of top quarks

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• Claudio Severi (U. Manchester)
• Friday 02 February 2024, 15:45-16:45
• MR19 (Potter Room, Pavilion B), CMS.

If you have a question about this talk, please contact Nico Gubernari.

The ATLAS Collaboration recently reported the observation of quantum entanglement between top quarks. This constitutes the first observation of entanglement in a pair of quarks, and the observation of entanglement at the highest energy to date. Prompted by these results, I will illustrate recent developments in the field of quantum information theory in collider experiments, as this measurement paves the way to use colliders as a laboratory to study quantum information and other foundational properties of quantum mechanics. Furthermore, other similar measurements such as measuring quantum discord, reconstructing the quantum steering ellipsoid, and even establishing a violation of Bell inequalities, may be achievable at the LHC in the near future. From a high-energy physics perspective, borrowing concepts from quantum information theory inspires new approaches and observables that can be used to search new phenomena that may have escaped detection so far.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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