Matthias Kleinmann - Using Quantum Information Theory in High Energy collider experiments

Fri, 27 Mar 2026 00:00:00 +0000

Using Quantum Information Theory in High Energy collider experiments

Ce séminaire, donné par Matthias Kleinmann, aura lieu le 27 March 2026, à 9:0. Il aura lieu en salle 25-26/105 .

Vous trouverez un plan du campus ici.

Résumé

Quantum entanglement has recently been observed in high-energy particle physics processes, exploring quantum information in relativistic regimes, but also posing conceptual and technical challenges in the interpretation of the results. In this talk, I will discuss spin-spin correlations in collider experiments from a quantum information perspective. Unlike in conventional quantum optics settings, the systems are relativistic and the particle momenta and measurements are not under active experimental control. Adapting methods from quantum information theory, we suggest enhanced ways to analyze entanglement and the soundness of the predictions from quantum field theory and the standard model in high-energy collider experiments. As a proof of concept we illustrate the application of our methods to top pair production in the LHC using Monte Carlo simulations.

Logical possibilities for physics after MIP*=RE

Sun, 17 Sep 2023 00:00:00 +0000

MIP*=RE implies that C_{qa} (the closure of the set of tensor product correlations) and C_{qc} (the set of commuting correlations) can be separated by a hyperplane (i.e., a Bell-like inequality) and that there are correlations produced by commuting measurements (a finite number of them and with a finite number of outcomes) on an infinite-dimensional quantum system which cannot be approximated by sequences of finite-dimensional tensor product correlations. We point out that there are four logically possible universes after this result. Each possibility is interesting because it reveals either limitations in accepted physical theories or opportunities to test crucial aspects of nature. We list some open problems that may help us to design a road map to learn in which of these universes we are.

Matthias Kleinmann | LIP6 - Équipe QI

Matthias Kleinmann - Using Quantum Information Theory in High Energy collider experiments

Using Quantum Information Theory in High Energy collider experiments

Résumé

Logical possibilities for physics after MIP*=RE