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Jun 10, 2016 at 11:41 comment added Schmelzer There is nothing which makes a theory which is not Einstein-causal (which is misleadingly named "non-local", as if a theory with, say, a maximal speed of information transfer of, say, 1000 c would not be a local theory) unphysical. If a theory is physical or not depends on it making testable predictions. The ("nonlocal") de Broglie-Bohm interpretation makes them, the same as QT itself, thus, is a physical theory.
Mar 3, 2013 at 20:16 vote accept Deiwin
Dec 30, 2012 at 18:08 comment added Christoph I wouldn't dismiss non-local theories out of hand: string theory comes with its own flavour of non-locality via the holographic principle and atemporal/time-symmetric theories (transactional interpretation) are imo quite elegant from a philosophical point of view (even though personally I don't really buy the identification of the wave function and its conjugate as offer and confirmation wave)
Dec 30, 2012 at 17:10 history answered Johannes CC BY-SA 3.0