On 6 February 2014 00:07, Bruno Marchal <[email protected]> wrote: > > OK. But time symmetry still asks fro special boundary condition, and seems > to me to still look like using ad hoc information to select one reality > against others. I agree with Deutsch's idea that Cramer transactional > theory is still a MWI, + initial conditions selecting a reality. >
Which special boundary conditions? The only ones in an EPR experiment are the emitter and measuring device settings. The reality selected is the one with those settings - (anyway, I don't think the components of an EPR system can decohere during the experiment, or the effect would be lost - so there is only one reality involved). In all other cases - where the system isn't carefully prepared to ensure time symmetry is preserved - the effects of time symmetry will be washed out by the entropy gradient and isn't noticable at the macro level. I'm not talking about Cramer. I found his theory too baroque to understand. This is just Huw Price et al saying that logically, given that physics is time symmetric, we can expect certain things to be *possible* - like EPR. The mechanics of how or if it works I leave to people able to do the calculations. -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
