General Relativity and Gravitation

, Volume 26, Issue 12, pp 1171–1176 | Cite as

String theory and gravity

  • T. Damour
  • A. M. Polyakov


It is pointed out that string-loop effects may generate matter couplings for the dilaton allowing this scalar partner of the tensorial graviton to stay massless while contributing to macroscopic gravity in a way naturally compatible with existing experimental data. Under a certain assumption of universality of the dilaton coupling functions, the cosmological evolution drives the dilaton towards values where it decouples from matter. At the present cosmological epoch, the coupling to matter of the dilaton should be very small, but non zero. This provides a new motivation for improving the experimental tests of Einstein's Equivalence Principle.


Experimental Data String Theory Experimental Test Differential Geometry Equivalence Principle 
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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • T. Damour
    • 1
  • A. M. Polyakov
    • 2
  1. 1.Institut des Hautes Etudes ScientifiquesBures-sur-YvetteFrance
  2. 2.Physics DepartmentPrinceton UniversityPrincetonUSA

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