EFT Coffee: Rafael Aoude, "Decoherence at colliders"

Friday 10 Oct 2025, 13:30 → 14:30 Europe/Zurich

4/2-037 - TH meeting room (CERN)

Meeting for informal discussion of EFT-related topics. 
List of potential papers to be discussed

13:30 → 14:30 Decoherence at colliders

Recent measurements at the Large Hadron Collider have observed entanglement in the spins of top pairs. The effects of real and virtual radiation are expected to lead to quantum decoherence and a reduction of entanglement. In this talk, I will revisit entanglement at colliders and present the effects of decoherence from various different types of radiation for a maximally entangled pair of fermions -- a bipartite system of qubits in a Bell state. I will also present an identification of Kraus operators describing the evolution of the open quantum system with the integrated Altarelli-Parisi splitting functions. Based on quant-ph/2504.07030.

Speaker: Rafael Aoude