Dilatons in string cosmology

Nemanja Kaloper, Keith A. Olive

Research output: Contribution to journalArticle

62 Scopus citations


We consider the evolution of the dilaton in a Friedmann-Robertson-Walker background by numerically integrating the equations of motion as determined by the low-energy expansion of the string theory action. We find that the dilaton may be fixed by either self-interaction terms providing a dilaton mass or decoupling in a radiation dominated Universe. We also comment on conditions applicable to an exponentially expanding phase.

Original languageEnglish (US)
Pages (from-to)185-193
Number of pages9
JournalAstroparticle Physics
Issue number2
StatePublished - Mar 1993

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