On 06 Feb 2014, at 21:30, LizR wrote:
On 7 February 2014 05:36, Bruno Marchal <marc...@ulb.ac.be> wrote:
On 05 Feb 2014, at 20:30, LizR wrote:
On 6 February 2014 00:07, Bruno Marchal <marc...@ulb.ac.be> 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.
Hmm, EPR will use there polarization states, and their entanglement.
Bruno
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