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It seems, one could exploit the Casimir effect to send messages across arbitrarily-large distances with carefully-tuned Casimir plates.

Obviously, relativity would preclude FTL information transfer, but as long as one did not try to measure the signal timing and impose an external reference frame of time, then there would be no violation of the speed of light limit, and would, in theory, be communicated instantaneously (presumably along an extra-dimensional Calabi-Yau surface/"brane").

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    $\begingroup$ @lurscher: As other people have said--- extraordinary claims require only ordinary evidence, just more of it, and more carefully analyzed. That's the basic principle of science. On the other hand, there is good evidence that Casimir effect does not allow FTL, because it can be calculated without any "vacuum" mysticism, just by induced polarizations interacting with other induced polarizations (Casimir force and Van-Der-Waals force are one and the same) and these obviously propagate at the speed of light. $\endgroup$
    – Ron Maimon
    Commented Aug 27, 2012 at 21:22
  • $\begingroup$ Possible duplicate: physics.stackexchange.com/q/18835/2451 $\endgroup$
    – Qmechanic ♦
    Commented Aug 28, 2012 at 3:37
  • $\begingroup$ why would measuring or not the signal delay do anything? is not like the signal delay is part of some nonconmuting observables. $\endgroup$
    – lurscher
    Commented Aug 31, 2012 at 23:22
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    $\begingroup$ what is quantum resonance? it has something to do with crystals and chakras? $\endgroup$
    – user56771
    Commented Sep 1, 2012 at 0:39
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    $\begingroup$ @MarkJ, so, show us the resonant absortion equation in the receiver casimir plates that describes the amplitude oscillation. $\endgroup$
    – user56771
    Commented Sep 29, 2012 at 0:32

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