Abstract
The dynamics of a dilaton field and an inflaton field is studied in the FRW (flat, open, closed) models. Due to the interaction between a dilaton and an inflaton, the onset of the inflationary stage of the universe can be affected considerably even in a spatially flat universe. Under the assumption of an equal probability on the phase space, we find that the coupling parameter (defined in the text) must be if more than of the initial conditions have inflationary solutions. We also follow the subsequent evolution of the dilaton to evaluate the present PPN parameter. It turns out that the current constraint on the PPN parameter puts a further limit on the coupling .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
