We examine the possibility that an epoch of inflationary expansion induces high-frequency oscillations of Newton's constant G. The effect occurs because inflation can shift the expectation value of a nonminimally coupled, Brans-Dicke-like field away from the minimum of its effective potential. At some time after inflation ends, the field begins to oscillate, resulting in periodic variations in G. We find conditions for which the oscillation energy would be sufficient to close the Universe, consistent with all known constraints from cosmology and local tests of general relativity.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)