GAUGE: the GrAnd Unification and Gravity Explorer

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

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)549-572
Number of pages24
JournalExperimental Astronomy
Issue number2
Early online date12 Jun 2008
Publication statusPublished - Mar 2009


  • Atom interferometry
  • Equivalence principle
  • Fundamental physics
  • Mass-spin coupling
  • Space mission


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