Physicists Dispute Table-Top Relativity Test

By Eric Hand of Nature magazine Can the time-warping ways of Einstein's theory of general relativity be measured by the quantum 'ticking' of an atom? In 2010, researchers at the University of California, Berkeley, claimed in Nature that they had used an inexpensive table-top apparatus to show how gravity had altered a fundamental oscillation of two atoms.

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Physicists Dispute Table-Top Relativity Test