Quantum nonlocality and Grothendieck constants (Nicolas Brunner, UniGe)

28.04.2017 14:00

Quantum theory allows for distant systems to be correlated in ways that admits no analogue in classical physics. When observers perform local measurements on entangled particles, they observe strong correlations between the results of their measurements. Remarkably, these correlations are stronger than what would be possible in any physical theory satisfying a natural concept of locality, as witnessed by the violation of Bell inequalities. This phenomenon of quantum nonlocality also plays a central in quantum information processing, and allows e.g. for the generation of certified randomness. This talk will give a pedestrian introduction to this topic, and discuss its close connection to a well-known mathematical problem, namely the Grothendieck inequality. In particular, recent results on quantum nonlocality provide novel bounds on Grothendieck constants.

Lieu

Bâtiment: Battelle

Séminaire "Groupes de Lie et espaces des modules"

entrée libre