Séminaire du Groupe de Travail "Quantum Information and Quantum Computing": Stefano PIRONIO (Laboratoire d'Information Quantique, Université libre de Bruxelles)

Le groupe de travail "Quantum Information and Quantum Computing" a le plaisir de vous inviter séminaire de Stefano PIRONIO (Laboratoire d'Information Quantique, Université libre de Bruxelles)

Date: Vendredi 20 mars: 14h00-16h00

Lieu : CRIStAL amphitheatre

Participation à distance : https://univ-lille-fr.zoom.us/j/98595581800?pwd=nExZhUvJzUXOeni8bDSEKMpsLTqkrm.1

14:00-14:45: General presentation, accessible to everyone

How to Trust a Quantum Box: Bell’s Theorem for Quantum Engineers
Abstract:

How can we be sure that a quantum device really performs as intended? As quantum technologies promise secure communication, certified randomness, and unprecedented computational power, verifying their behavior becomes both essential and surprisingly challenging. One of the deepest results of 20th-century physics, Bell’s theorem, has become a practical tool: it allows us to test quantum behavior by treating devices as black boxes and observing only their input–output statistics. In this talk, I’ll introduce the central ideas behind this approach, known as device-independent quantum information, and show how fundamental physics offers new ways to build and trust quantum technologies.

14:45-15:00: Coffee break

15:00-15:45: Second presentation for experts

Nonlocality: driver for randomness?
Abstract:

The basic intuition underlying device-independent protocols for randomness certification is that nonlocality implies randomness. But how far does that intuition really go? Could there be Bell inequalities or maximally nonlocal that do not certify randomness? I will present results addressing these questions based on arXiv:2408.03665 and arXiv:2509.08623