An Exact Solution with Exit in the New Inflationary Universe Model

Details An Exact Solution with Exit in the New Inflationary Universe Model An Exact Solution with Exit in the New Inflationary Universe Model

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chphl..18..997w&link_type=abstract

Chinese Physics Letters, Volume 18, Issue 7, pp. 997-999 (2001).

Physics

3

Scientific paper

Taking the cosmological expansion rate directly as a function of the inflaton field ϕ instead of as a function of time, we present a new exact solution to Einstein's equations that describe the evolution of the inflationary universe model. This includes a solution which has nearly exponential inflation for ϕ0⩽ϕ⩽ϕf, and then develops smoothly towards radiation-like evolution for ϕ⩾ϕf. The inflation is driven by the evolution of a scalar field with an inflation potential, V(ϕ) = V0-m2ϕ2/2 + λϕ4/4. The spectral index of the scalar density, ns, is computed and ns lies well inside the limits set by the cosmic background explorer satellite.

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