ASTROPHYSICS. Atom-interferometry constraints on dark energy

P Hamilton; M Jaffe; P Haslinger; Q Simmons; H Müller; J Khoury

doi:10.1126/science.aaa8883

ASTROPHYSICS. Atom-interferometry constraints on dark energy

Science. 2015 Aug 21;349(6250):849-51. doi: 10.1126/science.aaa8883.

Authors

P Hamilton¹, M Jaffe¹, P Haslinger¹, Q Simmons¹, H Müller², J Khoury³

Affiliations

¹ Department of Physics, 366 Le Conte Hall MS 7300, University of California-Berkeley, Berkeley, CA 94720, USA.
² Department of Physics, 366 Le Conte Hall MS 7300, University of California-Berkeley, Berkeley, CA 94720, USA. Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA. hm@berkeley.edu.
³ Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA.

PMID: 26293958
DOI: 10.1126/science.aaa8883

Abstract

If dark energy, which drives the accelerated expansion of the universe, consists of a light scalar field, it might be detectable as a "fifth force" between normal-matter objects, in potential conflict with precision tests of gravity. Chameleon fields and other theories with screening mechanisms, however, can evade these tests by suppressing the forces in regions of high density, such as the laboratory. Using a cesium matter-wave interferometer near a spherical mass in an ultrahigh-vacuum chamber, we reduced the screening mechanism by probing the field with individual atoms rather than with bulk matter. We thereby constrained a wide class of dark energy theories, including a range of chameleon and other theories that reproduce the observed cosmic acceleration.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.