The discussion revolves around the nature of quantum entanglement, specifically whether entanglement can only be created locally. Participants explore various scenarios, including entanglement swapping and the implications of measurements on entangled particles, while questioning the definitions and interpretations of locality in quantum mechanics.
Participants express differing views on the locality of entanglement creation and the implications of entanglement swapping. There is no consensus, as some argue for a strictly local interpretation while others advocate for the existence of non-local correlations.
Limitations include the dependence on definitions of locality and entanglement, as well as unresolved questions regarding the nature of interactions and the timing of entanglement changes. The discussion reflects a range of interpretations within quantum mechanics, particularly regarding causal relationships and spatial correlations.
Note that this question assumes realism--that entanglement is something that has to be "created". In other words, it is interpretation dependent, as @Cthugha has pointed out.DrChinese said:So how is 1,4 entanglement being created when 1,2,3,4 are all distant from each other?
As the discussion here has shown, this is not true, in the sense that two particles can be entangled without ever having undergone a common local interaction. That is an experimental fact.greypilgrim said:As far as I know, entanglement can initially only be created locally