On 4/16/2022 3:22 PM, George Kahrimanis wrote:
*CHANGE OF MIND.*Not that I made any technical mistake in my previous
posting, but I failed to think out the conclusion properly. I was just
stupid -- am I allowed to flame myself? In brief: splits propagating
on light cones seems to be the correct conclusion, properly
understood. Sorry for saying the opposite in my previous posting.
First, a clarification.
On Saturday, April 16, 2022 at 5:48:25 AM UTC+3 meeke...@gmail.com wrote:
"In George's description" means George knows...what? Does he know
the setting of Alice's polarizer? Does he know that she got 1 or
know that she got 0, on only that she got a result? Some of these
he can know without being the forward light cone of Alice's
measurement.
Something like the superobserver of Schroedinger's cat. He knows in
advance the axes of the two polarisers and the times when Alice and
Bob read their records. Not the outcomes, of course.
But the purpose of randomizing the polarizer settings using photon from
sources on opposite sides of the universe is to prevent anyone from
knowing both settings before a measurement.
I'm not sure I see any function for your superobserver anyway. Are you
sure you need him?
Brent
*My stupidity was* to say that when Alice reads the record then Bob
splits too, without taking into account that simultaneity is relative
to the system of reference. DUH! The time of Bob's first split is not
covariant. However, this is not a disaster of the theory, because at
first the two Bobs are identical for a while, until he is informed of
Alice's record -- or otherwise affected by it, I add now. So, until
the two Bobs begin to differ from each other, the split is a
distinction without a difference. It functions as a technical
placeholder prepared by the theory, to accommodate the difference
that will occur later.
*Conclusion.* As Bruce says, the split is non-local; but, since the
time of Bob's first split depends on the frame of reference, it is a
technicality without physical meaning. Only when the lightcone
starting with Alice's measurement reaches Bob, then the split becomes
"real", so to speak.
George K.
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