On 7 November 2014 09:56, meekerdb <meeke...@verizon.net> wrote: > I'd say that expansion of the universe is almost necessary, not > contingent. The AoT has to point in the direction of entropy increase and > in almost all models that's correlated to the expansion of the universe. > If it is bigger at one time than at another then the AoT will point toward > the bigger end. I say "almost" because there are some ways around it. If > the universe recontracts the AoT will probably continue to point toward the > Big Crunch, at least until the total entropy equals the Bekenstein bound. > Or on the other possibility, L.S. Schulmann has written a nice little book > about his investigation of universes in which the AoT reverses so it always > points to the biggest phase of the universe. > > Yes, that is indeed exactly the position I have long argued for on this very forum.
To summarise my argument, which has at times been vigorously opposed, I think by you amongst others, but not yet actually shot down (kaon decay comes closest, but doesn't appear to be very important in generating the AOT, although it's possible it actually had/has a pivotal role we're unaware of). a) the universe is expanding for some reason, possibly necessary in the sense of being built into the laws of physics (e.g. as a result of eternal inflation ... perhaps?) - or perhaps contingent, that is to say not mandated by the laws of physics, but maybe the result of some symmetry breaking etc. b) all the other things regarded as the AOT emerge from (a). I have given details of this at some length on previous occasions, but briefly it's that various bound states (nucleons, galaxies etc) can emerge from the cooling caused by the universal expansion. -- 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
