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I have found an article about an experiment that states that gravity on a small scale doesn't experience quantum effects. Of course the headline has been catchy, so I want to ask about the real importance or relevance of the experiment.
Or for short: Do the results imply any consequences on GUT's.
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.023001
Or for short: Do the results imply any consequences on GUT's.
We report a test of the universality of free fall by comparing the gravity acceleration of the Rb87 atoms in mF=+1 versus those in mF=−1, of which the corresponding spin orientations are opposite. A Mach-Zehnder-type atom interferometer is exploited to alternately measure the free fall acceleration of the atoms in these two magnetic sublevels, and the resultant Eötvös ratio is ηS=(0.2±1.2)×10−7. This also gives an upper limit of 5.4×10−6m−2 for a possible gradient field of the spacetime torsion. The interferometer using atoms in mF=±1 is highly sensitive to the magnetic field inhomogeneity. A double differential measurement method is developed to alleviate the inhomogeneity influence, of which the effectiveness is validated by a magnetic field modulating experiment.
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.023001