Perhaps the Casimir effect can be used to detect a shift, given its change in the population of virtual particles in the gap. On Mar 28, 2013, at 9:32 AM, Henry Baker wrote:
If the statistical process is Gaussian, the tails fall off very fast, so 'much larger' may still only mean 4-5 orders of magnitude, which is still many orders of magnitude away from where we can 'see' today. E.g., the photons arriving from the other side of the universe have sampled such a large variety of variations that the dispersion is non-existent.
Also, if you believe Feynman, these photons have also sampled _all_ paths.
Also, perhaps that famous map of the radiation from the early universe has captured precisely these fluctuations?
At 06:09 AM 3/28/2013, Hans Havermann wrote:
Within this approach, the propagation of a photon is a statistical process at scales much larger than the Planck scale.
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