[The Cajun]

One thing we know about this space-time is that the quantum numbers associated with material representations (mass, energy) if propagated faster than light must produce causality violations.

What about that little quirk of entangled photons able to transfer their spin information instantaneously across billions of light years, you know, spooky actions at a distance?

What about a relatively near galaxy and a quasar billions of light years away interacting with each other gravitationally?
Again, spooky action at a distance, but another *flavor* of it.

[FredZarguna]

The second example is not an example of "spooky action at a distance," so it is not a flavor of anything except proving my point and disproving yours. In the non-quantum formulation of gravity (which is the only rigorous theory we currently have) space is bent by gravitational objects. This bending is propagated over time and the speed of propagation does not exceed the speed of light.

When (for example) a star goes nova and masses on the order of many solar masses (10^31 kg) are blasted into space objects under its gravitational influence light years away do not suddenly start drifting free because of the (now) lighter mass of the nova remnant. That will take an amount of time equal to how many light years away they are.

The sun is eight light minutes away. If it suddenly disappeared earth would not immediately fly out of its orbit (it would take eight light minutes.) Pluto wouldn't tangent off into the galaxy for 5 1/2 hours.

In the quantum mechanical version, interactions are mediated by gauge bosons. No gauge boson, including the graviton, moves faster than light. So in the future, when we have a fully quantum theory of gravity, you will still be mistaken.

As for your first example, you were inattentive. I specifically said that the quantum numbers associated with materiality (like mass and energy) cannot be superluminally conveyed. Spin is not such a quantity.

The collapse of wave functions (more properly state vectors) in entangled states can produce apparently nonlocal effects, but these nonlocal effects do not transmit material, and they do not transfer any information. There is no way a remote observer measuring his "half" of an eigenstate can know that his measurement result was produced by the collapse of the "other half" of the system by a remote event, or simply by his own measurement. Thus spin flipping, while Über Kewl, transmits no information, and cannot be used to send FTL signals. [Google: "Quantum no communication theorem" if you're interested in details.]

Sorry. Still no cigar.

2.9979 x 10⁸ m/s. Not just a good idea. It's The Law.