On 02 Jan 2014, at 17:44, Edgar L. Owen wrote:
Jason,
No, please carefully read my new topic post "Another shot at how
spacetime emerges from quantum events" where I explain this process
in detail. You will see why it doesn't lead to MW but instead to
many fragmentary spacetimes (entanglement networks) which link and
align via shared events. But all this occurs in the same underlying
computational (not dimensional) space which everything is part of.
What do you mean by "computational space"? What is it?
Bruno
The spin orientation of the two particles is fixed in their mutual
frame when they are created. It's just that that frame (entanglement
network) is not linked to that of the observer until a common event
(observer's measurement of one particle's spin) links and aligns the
particles' spin orientation frame to that of the observer's. Prior
to that they are completely separate spacetimes. That's why the
spins are indeterminate in the frame of the observer until he
measures one and by doing so links and aligns their frame with his.
This process falsifies FTL, non-locality, MWI (unless you want to
call the fragmentary entanglement networks separate worlds. They are
separate spacetime fragments but not really separate 'worlds' since
they continually merge and align at common events in the SAME
computational reality.)
Edgar
On Thursday, January 2, 2014 9:11:57 AM UTC-5, Jason wrote:
On Thu, Jan 2, 2014 at 7:53 AM, Edgar L. Owen <[email protected]> wrote:
Jason,
Great! An amazing post! You seem to have correctly gotten part of
the theory I proposed in my separate topic "Another stab at how
spacetime emerges from quantum events." Please refer to that topic
to confirm...
Do you understand how the fact that the spins are determined in the
frames of the spinning particles WHEN they are created falsifies FTL
and non-locality?
Yes, but I also think this leads to many worlds, since there is not
a single state of the superposition. The particle pair is not just
Up_Ddown or Down_Up, but both Up_Down + Down_Up. After the
measurement, it is Measured_Up_Down + Measured_Down_Up.
Bell's inequality leads to a refutation that the two particles can
have just a single state.
Jason
Edgar
On Wednesday, January 1, 2014 2:21:33 PM UTC-5, Jason wrote:
On Wed, Jan 1, 2014 at 4:33 AM, LizR <[email protected]> wrote:
On 1 January 2014 21:34, meekerdb <[email protected]> wrote:
On 12/31/2013 7:22 PM, LizR wrote:
On 1 January 2014 13:54, meekerdb <[email protected]> wrote:
Of course in Hilbert space there's no FTL because the system is
just one point and when a measurement is performed it projects the
system ray onto a mixture of subspaces; spacetime coordinates are
just some labels.
I thought there was no FTL in ordinary space, either? (I mean, none
required for the MWI?)
Right, but the state in Hilbert space is something like |x1 y1 z1 s1
x2 y2 z2 s2> and when Alice measures s1 at (x1 y1 z1) then s2 is
correlated at (x2 y2 z2). As I understand it the MWI advocates say
this isn't FTL because this is just selecting out one of infinitely
many results |s1 s2>. But the 'selection' has to pair up the spins
in a way that violates Bell's inequality.
If I understand correctly ... actually, let me just check if I do,
before I go any further, in case I'm talking out my arse. Which
wouldn't be the first time.
I assume we're talking about an EPR correlation here?
If yes, I've never understood how the MWI explains this.
The thing to remember is entanglement is the same thing as
measurement. The entangled pair of particles have measured each
other, but they remain isolated from the rest of the environment
(and thus in a superposition, of say UD and DU). Once you as an
observer measure either of the two particles, you have by extension
measured both of them, since the position, which you measured has
already measured the electron, and now you are entangled in their
superposition.
Jason
I've see it explained with ASCII diagrams by Bill Taylor on the FOAR
forum, and far be it from me to quibble with Bill, but it never made
sense to me. Somehow, the various branches just join up correctly...
The only explanation I've come across that I really understand for
EPR, and that doesn't violate locality etc is the time symmetry one,
where all influences travel along the light cone, but are allowed to
go either way in time.
So although I quite like the MWI because of its ontological
implications, this is one point on which I am agnostic, because I
don't understand the explanation.
In fact, it's generally assumed to be very, very STL (unless light
itself is involved). At great distances from the laboratory, one
imagines that the superposition caused by whatever we might do to
cats in boxes would decay to the level of noise, and fail to
spread any further.
That's an interesting viewpoint - but it's taking spacetime instead
of Hilbert space to be the arena. If we take the cat, either alive
or dead, and shoot it off into space then, as a signal, it won't
fall off as 1/r^2.
No, but it will travel STL!
Sure. I was just commenting on the idea that the entanglement has a
kind of limited range because of 'background noise'. An interesting
idea, similar to one I've had that there is a smallest non-zero
probability.
But if you want to get FTL, that's possible if Alice and Bob are
near opposite sides of our Hubble sphere when they do their
measurements. They are then already moving apart faster than c and
will never be able to communicate - with each other, but we, in the
middle will eventually receive reports from them so that we can
confirm the violation of Bell's inequality.
Hmm, that's a good point. That would, however, fit in nicely with
time symmetry (which really needs a nice acronym, I'm not sure "TS"
cuts it). I tend to evangelise a bit on time symmetry, but only
because everyone else roundly ignores it, and it seems to me that it
at least has potential.
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