GAUGE: the GrAnd Unification and Gravity Explorer

Details GAUGE: the GrAnd Unification and Gravity Explorer GAUGE: the GrAnd Unification and Gravity Explorer

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009exa....23..549a&link_type=abstract

Experimental Astronomy, Volume 23, Issue 2, pp.549-572

Physics

5

Fundamental Physics, Space Mission, Equivalence Principle, Mass&Ndash, Spin Coupling, Atom Interferometry

Scientific paper

The GAUGE (GrAnd Unification and Gravity Explorer) mission proposes to use a drag-free spacecraft platform onto which a number of experiments are attached. They are designed to address a number of key issues at the interface between gravity and unification with the other forces of nature. The equivalence principle is to be probed with both a high-precision test using classical macroscopic test bodies, and, to lower precision, using microscopic test bodies via cold-atom interferometry. These two equivalence principle tests will explore string-dilaton theories and the effect of space-time fluctuations respectively. The macroscopic test bodies will also be used for intermediate-range inverse-square law and an axion-like spin-coupling search. The microscopic test bodies offer the prospect of extending the range of tests to also include short-range inverse-square law and spin-coupling measurements as well as looking for evidence of quantum decoherence due to space-time fluctuations at the Planck scale.

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