3 ms·
They expect space to disperse particles like this, if space is indeed foamy. This is because small deviations over a long space-time would lead to large variati
by Cogito 14y ago
They expect space to disperse particles like this, if space is indeed foamy. This is because small deviations over a long space-time would lead to large variations.
This bunch of photons, and two other bunches, seem to have not been dispersed. As the abstract linked on one of the other comments says,
...the limit on the dispersion strength is k1 < 1.61 x 10-5 sec Gpc-1 GeV-1 ... In the context of some theories of quantum gravity this conservative bound [suggests] that spacetime is smooth at energies perhaps a factor of 1000 below the Planck length.
- CamperBob2 14y agoThis is because small deviations over a long space-time would lead to large variations. And the reason the RMS deviation of those variations wouldn't be expected to decrease in proportion to the (immense) path length would be...? The idea that we can make any inferences about photon disperson based on this particular observation seems about as credible as Noah's Ark. But, as has been pointed out elsewhere in the thread, the article is the primary source, not the pop-sci summary.