On Fri, Sep 16, 2016 at 10:13 PM, jim bell <[1]jdb10987@yahoo.com>
   wrote:

   [2]https://www.yahoo.com/news/entangled-particles-reveal-
   even-spookier-action-thought-125723794.html

   I'm by no means an expert in quantum physics, which makes my lack of
   surprise at this fairly uninteresting, but it seems to me these results
   are completely compatible with the time-symmetric interpretation of
   quantum mechanics. If I understand it correctly, according to TSQM the
   particle already "knows" about its future interactions to the extent
   that quantum information is preserved through any intervening
   interactions. So in the case of photon-splitting, the photons leave
   their source with polarizations that are aligned with (or opposite) the
   axis on which they will be measured. You could say the information
   "propagates" in both temporal directions, but I think it makes more
   sense to think of the particle's entire timeline as a single entity.
   According to the papers I've read on TSQM, it makes (or made) no
   predictions that are different from the Copenhagen interpretation. This
   experiment seems like it may be the first to show a difference. Not
   necessarily because of any predictions, but because of the additional
   mental contortions required to hang on to the Copenhagen
   interpretation. There's still no ability to send "real" information
   faster than light or backward in time, though. I say this only because
   of the purported equivalence between TSQM and Copenhagen, not because I
   have any idea why it should be the case. Intuitively, it seems like it
   could be related to the (quantum) information-theoretic version of
   entropy that you get with reversible computations. Or maybe even just
   real entropy, since TSQM still "behaves" as if it's nondeterministic
   from our perspective, since we can never know enough about a system to
   know its "true" internal state. So somehow everything conspires to
   prevent us from setting up a system that would carry some piece of
   information back in time that we care about.
   I guess another way to look at it is that the universe is a solution to
   some kind of differential equation. Possible solutions that contain
   paradoxes aren't valid, so they don't happen. Not via some shift in
   some "unified" timeline ala Star Trek, but through colossal numbers of
   tiny shifts that disperse any information that we're trying to send
   back in time that would cause any kind of paradox at any scale. The
   result is a universe that appears to have an arrow of time at any scale
   we can actually measure, appears to mostly follow General Relativity,
   etc. Until you get to scales, large and small, where the exact
   underlying geometry starts to matter.
   Come to think of it, if paradoxes are what's important, the ability to
   send information back in your own timeline (i.e. within your own past
   light cone) is all that matters. If there is no privileged reference
   frame, this also means you can't send information into spacelike
   regions of your own light cone, because if two entities do that then
   you can arrange things to send information into your own past light
   cone. But if there IS a privileged reference frame, say, the reference
   frame of the CMB, where you can't send information into *its* past
   light cone, then you can send information faster than light but still
   not into your own past. Recall that the Lorentz transformations were
   initially introduced to (successfully) explain how light could appear
   to always be moving the same speed even with a luminiferous ether, but
   then Einstein discarded the luminiferous ether because he realized it
   wasn't necessary, not because there was any evidence that contradicted
   it.
   I may well be misinterpreting what TSQM says, so please don't discard
   it on the basis of my uninformed interpretation! Go read up on it and
   THEN discard it ;-)
   [3]http://jamesowenweatherall.com/SCPPRG/AharonovPopescuTollaksen2010Ph
   ysToday_TimeSymQM.pdf

References

   1. mailto:jdb10987@yahoo.com
   2. https://www.yahoo.com/news/entangled-particles-reveal-even-spookier-action-thought-125723794.html?soc_src=mail&soc_trk=ma
   3. http://jamesowenweatherall.com/SCPPRG/AharonovPopescuTollaksen2010PhysToday_TimeSymQM.pdf