Non-locality Definition and 57 Threads

The famous Bell experiment would somehow proof non-locality and/or traveling of information faster then light. A very simple explenation of the experiment is this: there is a subatomic event that creates a particle pair going opposite directions. The subatomic event determines the possible...

consider the Doppler shift formula f=f'gamma(1+betacostheta). (1) the measurements of f and f' are associated with the measurement of time intervals, during which, depending on the scenario we follow, beta and theta could change. authors say that using (1) we make the "locality" assmption in...

EPR argument makes use of conservation of momentum between two outgoing particles. Einstein boxes argument makes use of conservation of particle numbers. Anybody can tell me an experiment which proves that QM is non-local without invoking conservation law?

How does instantanious action at a distance reconcile itself with Planck Time and the assumption that nothing can happen in this minuscule timescale? Does the transition from cause to effect not have a Planck time after the cause and before the effect? Could one describe a unit of Planck Time...

In trying to grasp the Bell Theorem that "reality must be non-local" I have a question---what exactly does it mean to say that two physical objects are "local" vs "non-local" in their interactions ? In reading Nick Herberts book, (1985), Quantum Reality, he states that local interaction =...

In this thread, I got a lot of different replies on exactly how to interpret Bell's theorem. Some suggested relativity must be wrong; others suggested Bell's inequality might not disprove locality, but some other assumption Bell made (such as an assumption based on the existence of a reality)...

If particles are made out of strings then it seems to follow that strings are, or can be, both local and non-local. Is this correct? I haven't seen any discussion of the wave-particle nature of strings (or the property of strings that allows particles to be also waves) so I assume I'm wrong...