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Experiment to detect dark energy forces using atom interferometry

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arxiv 1812.08244 v1 pith:TYXVGVSQ submitted 2018-12-19 physics.atom-ph astro-ph.COgr-qchep-ph

Experiment to detect dark energy forces using atom interferometry

Dylan Sabulsky , Indranil Dutta , E. A. Hinds , Benjamin Elder , Clare Burrage , Edmund J. Copeland This is my paper
classification physics.atom-ph astro-ph.COgr-qchep-ph
keywords theoriesatomgravityexperimentfieldforceinterferometrymass
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The accelerated expansion of the universe motivates a wide class of scalar field theories that modify gravity on large scales. In regions where the weak field limit of General Relativity has been confirmed by experiment, such theories need a screening mechanism to suppress the new force. We have measured the acceleration of an atom toward a macroscopic test mass inside a high vacuum chamber, where the new force is unscreened in some theories. Our measurement, made using atom interferometry, shows that the attraction between atoms and the test mass does not differ appreciably from Newtonian gravity. This result places stringent limits on the free parameters in chameleon and symmetron theories of modified gravity.

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