Artur Barasiński

2022 Nobel Prize in Physics for Quantum Information Experiments

The Nobel Prize in Physics 2022 was awarded jointly to Alain Aspect, John F. Clauser and Anton Zeilinger "for experiments with entangled photons, establishing the violation of Bell inequalities and pioneering quantum information science". In the talk, I will briefly explain the groundbreaking experiments using entangled quantum states. In particular, I will discuss Bell’s theorem which demonstrates the quantum nature of the microworld and the existence of quantum entangled states describing composed systems. Such states are, for instance, the basis of the quantum teleportation protocol, which allows the transfer of complete information about the quantum state under study while transmitting only classical information in the form of a short sequence of bits.