On 03 Jan 2014, at 23:06, LizR wrote:
On 4 January 2014 04:31, Gabriel Bodeen <[email protected]> wrote:
(I'm expanding on the comment by Jason.)
The "P-time" notion, if it means anything at all timelike, says that
there exists some uniquely correct ordering of events across space.
Consider these events: Pam's 3rd birthday party and Sam's 4th
birthday party
The "P-time" notion says that either (A) P3bp happens before S4bp,
(B) P3bp happens after S4bp, or (C) P3bp happens at the same time as
S4bp. The "P-time" notion, having not developed in a scientific
manner, can't offer any help in discovering which of A, B, or C is
the case; it merely says it is the case that, in principle, exactly
one of A, B, or C is true.
By contrast, the past century of physics concludes that A is true in
some reference frames, B is true in other reference frames, and C is
true in other other reference frames. It is NOT the case that, in
principle, exactly one of A, B, or C is true.
So there's a direct contradiction. And "P-time" falls on the wrong
side of the contradiction according to a whole century's worth of
experimental work in physics.
Very nicely summarised.
Furthermore, there is (scientific) theoretical work (c.f. http://www.sciencedaily.com/releases/2012/10/121002145454.htm
) that indicates that, by exploiting quantum behavior, we should be
able to build a superposition of one causal order and the reverse
causal order between two events in the same location. If that pans
out empirically, then the "P-time" notion won't even have the
appearance of being a local approximation to the truth.
Now that really IS fascinating!
(PS Bruno may even know one of those people - Ognyan Oreshkov)
I read "weak measurements are universal". He worked at ULB, still now,
I think. I cannot say I know him personally. He seems to do nice work
in quantum information science. We have a good "quantum information"
group led by Nicolas Cerf.
Bruno
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