Why $\psi$ is incomplete indeed: a simple illustration - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2022

Why $\psi$ is incomplete indeed: a simple illustration

Résumé

With the Nobel Prize attributed to Aspect, Clauser, and Zeilinger, the international scientific community acknowledged the fundamental importance of the experimental violation of Bell's inequalities. It is however still debated what fails in Bell's hypotheses, leading to these inequalities, and usually summarized as "local realism", or maybe more appropriately "classical local realism". The most common explanation is "quantum non-locality", that remains however fully compatible with relativistic causality; this makes wondering whether any non-local phenomenon is really involved in these experiments. Here we want to recapitulate another option, sometimes called "predictive incompleteness", closely related to the idea that the usual state vector $\psi$ is incomplete indeed, as it was claimed by Einstein, Podolsky and Rosen. However, the right way to complete $\psi$ has nothing to do with hidden variables, but requires to specify the measurement context, as it was claimed by Bohr. Here we will consider the simple case of two spin 1/2, or two qubits, in order to keep the argument simple, but it does apply generally in quantum mechanics.
Fichier principal
Vignette du fichier
2210.05969.pdf (82.71 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04307744 , version 1 (26-11-2023)

Identifiants

Citer

Philippe Grangier. Why $\psi$ is incomplete indeed: a simple illustration. 2022. ⟨hal-04307744⟩
27 Consultations
5 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More