GAUGE: the GrAnd Unification and Gravity Explorer

Author(s): A. Woodgate, E. M. Rasel, A. Peters, C. Pegrum, W. T. Ni, J. Mester, J. T. Mendonca, F. Loeffler, N. Lockerbie, C. Laemmerzahl, S. Reynaud, D. Shaul, H. Ward, C. Wang, W. Vodel, S. Vitale, C. Trenkel, P. Touboul, C. Torrie, S. Theil, T. J. Sumner, B. Lamine, A. Lambrecht, T. Damour, A. M. Cruise, M. Caldwell, P. Bouyer, C. J. Bordé, R. J. Bingham, J. D. Barrow, M. Arndt, K. Aplin, P. D’Arrigo, H. Dittus, H. Klein, P. Jetzer, U. Johann, C. Jentsch, J. Hough, G. D. Hammond, P. Gill, B. Foulon, W. Ertmer, G. Amelino-Camelia

Journal: Experimental Astronomy

Volume: 23

Page(s): 549-572

Year: 2008

DOI Number: 10.1007/s10686-008-9086-9

Link: Link to publication


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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