On Wed, Aug 14, 2019 at 10:10 PM Bruno Marchal <[email protected]> wrote:
> On 12 Aug 2019, at 14:42, Bruce Kellett <[email protected]> wrote: > > > That is simply incorrect. I refer you again to Zurek, who works in a > basically Everettian framework, but he stresses the importance of > environmental induced superselection (einselection) in producing the > preferred pointer basis. This then breaks things, in the sense that no > other basis is stable against decoherence, and other sets of basis vectors > rapidly (in times of the order of femtoseconds) collapse on to the > preferred pointer states. This is the basis of the emergence of the > classical world from the quantum substrate. And this occurs in Everett's > relative state approach just as much as in a Copenhagen-like collapse > models. > > > That explains why the many histories will look classical. But if I observe > a cat in the dead+alive state, > The point of the existence of a preferred basis is that you will never observe a cat in a "dead+alive" state. Bruce -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLSN0pG4NkqVigRrmDDjSqbwg_f%3DSxfUG%3D%2BRaKCLTPc0rQ%40mail.gmail.com.
