Talk: Lev Vaidman (Tel Aviv)

Title:

The many-worlds interpretation of quantum mechanics is the only way to avoid action at a distance

Abstract:

The nonlocality of quantum mechanics has two aspects: non-separability and action at a distance. The analysis of action at a distance requires the definition of a complete local description. It is easily understood in the frameworks of interpretations with ontology in three spatial dimensions, but I will argue that any interpretation which allows discussing action at distance requires definition of local description, even if it is in the form of an intelligent bet on an experiment performed in a localized space-time region. Then, a measurement of one particle of a spacelike separated entangled pair will invariably lead to an action at a distance in any single-world universe.