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Precision instrument bolsters efforts to find elusive dark energy - EurekAlert
UC Berkeley physicists combined an optical lattice with an atom interferometer to hold atoms in place for up to 70 seconds — a record for an atom interferometer — allowing them to more precisely test for deviations from the accepted theory of gravity that could be caused by dark energy particles such as chameleons or symmetrons. Though they detected no anomalies, they're improving the experiment to perform more sensitive tests of gravity, including whether gravity is quantized.
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