Telmo Menezes wrote: > On Thu, Apr 17, 2008 at 2:37 PM, Bruno Marchal <[EMAIL PROTECTED]> wrote: > >> Are you saying that the second law is verified in each of all >> "branches" of the (quantum) multiverse? >> > > I'm not saying that. > > >> I would say the second law is >> statistical, and is verified in most branches. In the MWI applied to >> quantum field it seems to me that there can be branches with an >> arbitrarily high number of photon creation without annihilation, and >> this for each period of time. >>
I'm not sure what source of photon creation you have in mind, but QFT doesn't allow violation of energy conservation. > > Yes, I would tend to agree with that, although I can't say I'm 100% > convinced. Anyway I'm a relative newcomer to this list so I don't feel > I have an informed opinion yet. Need to catch up with all the > arguments. Also have a thesis to finish, which tends to get in the way > :) > > I'm just arguing that the experiment with the rifle and the geiger > counter does not imply any second law anomaly. Yes, you are "forcing" > your consciousness to "move" to states where the atom never decays, > but if you consider the larger system, entropy is increasing as normal > because of the preparation and maintenance of the apparatus needed for > the experiment. > > Do you think this makes sense? > > Telmo Menezes. > The idea of the multiverse derives from quantum mechanics, e.g. the Everett no-collapse interpretation. But in that model the (microscopic) entropy never increases (or decreases), because QM evolution is unitary. It is only the coarse-grained entropy, i.e. restricted to this branch, that increases. Certainly within this branch you are correct that the entropy increase due to firing a gun is very much greater than the decrease due to an atom not decaying. Brent Meeker --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to [EMAIL PROTECTED] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/everything-list?hl=en -~----------~----~----~----~------~----~------~--~---
