> On 16 Jun 2018, at 22:41, Brent Meeker <[email protected]> wrote: > > > > On 6/16/2018 10:16 AM, John Clark wrote: >> > Another universe comes into existence when Joe the Plumber performs, >> say, a spin measurement. >> >> But a measurement (whatever in the world that means) does not need to be >> made and there is nothing special about Joe, if Everett is right the same >> thing happens every time an electron in Joe's skin encounters a photon, or >> for that matter whenever an electron anywhere encounters anything. > > That's where MWI gets fuzzy.
Not more than QM itself. We can define a world by a branch of the universe wave. But such world will be “world” only as part of a personal history. Everett disagrees, but his “relative state” is a better wording than “many-worlds” which is often confusing. > Do all the submicroscopic events that make to macroscopic difference create > different worlds? That can't be right because "worlds" are classical things. > So the Heisenberg but problem seems to reappear in different form. Heisenberg cut disappear, it is just that worlds differentiate from our perspective when they make difference for us, like when they can no more interfere. There is no cut, only the quantum wave (in the Schroedinger picture) and relative state related to macroscopic irreversibility, which needs only the classical chaos to be irreversible FAPP. Histories are internal things, already a form of first person plural notion. Bruno > > Brent > > -- > 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.
