We consider the dynamics of power-law inflation with a nonminimally coupled scalar field (Formula presented) It is well known that multiple scalar fields with exponential potentials (Formula presented) lead to an inflationary solution even if each scalar field is not capable to sustain inflation. In this paper, we show that inflation can be assisted even in the one-field case by the effect of nonminimal coupling. When (Formula presented) is positive, since an effective potential which arises by a conformal transformation becomes flatter compared with the case of (Formula presented) for (Formula presented) we have an inflationary solution even when the Universe evolves as noninflationary in the minimally coupled case. For negative (Formula presented) the assisted inflation can take place when (Formula presented) evolves in the region of (Formula presented).
|Number of pages||1|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2000|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)