> On 21 Jun 2018, at 07:53, Brent Meeker <[email protected]> wrote: > > > > On 6/20/2018 9:42 PM, Jason Resch wrote: >> >> >> On Tue, Jun 19, 2018 at 5:17 PM, Brent Meeker <[email protected] >> <mailto:[email protected]>> wrote: >> >> >> On 6/19/2018 6:55 AM, Jason Resch wrote: >>> >>> >>> On Tue, Jun 19, 2018 at 12:16 AM, Brent Meeker <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> On 6/18/2018 4:09 AM, Jason Resch wrote: >>> It will take a lot of work under his approach, but I am not aware of any >>> other system proposed by anyone, which even has a chance at this. >>> >>> Penrose's gravity induced collapse has as good a chance as Bruno's, >>> >>> At least Penrose has drawn a line in the sand, which can be experimentally >>> refuted. Though I don't see any motivation for any collapse base theory >>> since Everett provided an account of collapse without having to assume it. >>> (Again this is like adding appending motive demon theory, which is entirely >>> superfluous and adds whose sole motivation is to preserve the notion of >>> collapse as physically real rather than apparent) >>> >>> and a better chance of predicting some surprising but true physics. Some >>> version of transactional QM also has a chance. >>> >>> Transactional QM is another complication of the theory, proposing things we >>> have no evidence for to explain things which have already been explained >>> from a much simpler theory. >> >> You only think it's simpler because you close your eyes to the last step in >> going from a FAPP diagonal reduced density matrix to an actually diagonal >> reduced density matrix. A step that is perfectly equivalent to Bohr and >> Heisenberg's collapse postulate, except it tells you where to hide the >> collapse. >> >> >> Is the appearance of collapse not describable from the other postulates? > > "Appearance" is a psychological concept. So to decide what that means > requires a theory of mind.
Right. But the MWI needs only mechanism. The collapse needs magic. > Most advocates of MWI want to say that getting the off-diagonal terms of the > reduced density matrix "small enough" is enough to make it "appear" that the > wf has collapsed. But aside from this fuzziness there is the problem that in > some other basis the cross-terms may not be small at all; hence the preferred > basis problem? No, the base are imposed so as to make digital machines able to evolves, and apparently, cross terms ahem not been exploited (meaning that our brain are not quantum computer). But if our brain is a quantum computer, it might as well rotate some bit/qubit, and exploit some cross terms. > Do our minds impose a preferred basis? No. But our material brain does, and it needs to do that to become a classical machine, or to behave classically in some branch of the wave. The classicality is imposed by the fact that the key notion (the universal machine) is a classical concept, like all concept in theoretical science. > and why should different minds agree on it? To make sense of any conversation. Bruno > > Brent > >> >> Jason >> -- >> 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] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/everything-list >> <https://groups.google.com/group/everything-list>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > 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] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/everything-list > <https://groups.google.com/group/everything-list>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
