On 7 February 2014 05:36, Bruno Marchal <[email protected]> wrote: > > On 05 Feb 2014, at 20:30, LizR wrote: > > 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. > > > That will not be enough, I think. You need the state of the prepared > particle (say), and the measuring device + the result you measure on the > particle. Or worst, the end state of the physical universe. You can't > select one reality among all, and keep the interference right for arbitrary > measurement, without selecting the whole reversible unique history. >
I think that's why we use photons for EPR. They haven't enough internal state for those considerations to be relevant. For the experiment only a few factors are important, and carefully controlled. > > -- 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.
