On 10/10/2019 6:39 AM, John Clark wrote:
And of course nobody but me has bothered to read his book, but everybody has an opinion about it.
You keep posting that, but I've already posted that I have read Carroll's book, and I've watched his recent video. I don't think QM is the last word, so it's not a good idea to draw a lot of far fetched conclusions...like infinitely many universes in which everything happens. Reconciling QM and GR may very well impose some bound on an QM probabilities and those might limit the "worlds" to quasi-classical one we live in. Also MWI doesn't actually provide a physical mechanism for the "splitting"; decoherence combined with Zurek's envariance provides a partial mechanism but it leaves open questions like whether the split "propagates" at less than light speed or is instantaneous because it happens in Hilbert space. Carroll cops out by saying either one works...which is what Bohr would have said.
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