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comment Is it possible to transfer classical bits of information faster than light speed?
@ErikAronesty: But probabilities are not signals. An event at A does not reveal anything about a joint event on (A,B), except of course for the part which has to do with what happened at A. As for the deduction: that is happening entirely within your head based on what you have observed from light-like signals --- your deduction does not go forth and impose structure upon the world: you are merely swept into a contingency (corresponding to a "possible world"), the partial knowledge of which spreads outward at light speed from those sources which have been swept into the same contingencies.
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comment Schrodinger's dead cat when the evidence is destroyed
@Zarko: indeed, sequential Stern-Gerlach strikes at the heart of what I find mysterious about QM, and to me points out the problems with Bayesian and related interpretations (not that MWI actually clarifies anything here).
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Jun
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comment Subgroups of the Clifford Group
You ask what "progress" there has been made in (etc.), which implies that you are asking about what developments there has been from some starting point. What is it that you already know? Are you just asking whether there exists some characterization? Do you mind if there isn't a characterization, but a description of some subgroups of the Clifford group which are isomorphic to the Pauli group? Do you care if you get an answer which restricts to inner automorphisms of $\mathrm{GL}(2^n)$ or do you want a more complete theory? What base knowledge are you assuming when you say "progress"?
Jun
18
comment Subgroups of the Clifford Group
Progress, from which starting point?
Jun
8
comment Why do they call it quantum teleportation?
Apart from that, your understanding is essentially correct: there can be no distinction in the measurement statistics of B, without information from A and C. The joint system ABC has correlations which can only be witnessed using communication.
Jun
8
comment Why do they call it quantum teleportation?
"...at which time B will immediately exhibit different behavior upon measurement": I would suggest that this way of thinking is misleading. How is B "behaving" before or after measurement? There can be no noticeable change, because any process which would cause the "before" and "after" states to appear different, would be acting as a measurement on B before the joint measurement on A+C, disentangling B from A.
Mar
5
answered Can Information Travel Faster Than The Speed Of Light?