Physics – Nuclear Physics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988nuphb.303..713e&link_type=abstract
Nuclear Physics B, Volume 303, Issue 4, p. 713-727.
Physics
Nuclear Physics
26
Scientific paper
We compute the quantum fluctuations of a non-self-interacting but unstable scalar field of arbitrary mass during the period of inflation. Instead of treating the scalar field in a static De Sitter space, we begin with a scalar field in the Friedmann universe just before the start of inflation, and work out the dynamics of the growing quantum fluctuation of the field after it has entered into the inflationary epoch. We use the physically sensible method of Vilenkin to regularize the theory. We find that in all but two special cases the fluctuations produced are different from those in a static De Sitter space, and the effect of the finite width of the scalar field limits the growth of fluctuations.
Enqvist Kari
Ng Kin-Wang
Olive Keith A.
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