Physics
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..44.3072k&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 44, Issue 10, 15 November 1991, pp.3072-3076
Physics
3
Scientific paper
We consider constraints on preinflation subhorizon fluctuations in a chaotic inflationary model. The requirement that the energy density in the fluctuating field not exceed the Planck scale limits the amplitude of the fluctuations. The requirement that the preinflation fluctuations have a presently observable amplitude that is at least comparable to the quantum fluctuations generated during inflation constrains the length scale of the fluctuations. We show that in order for preinflation fluctuations to be observable above the background due to quantum fluctuations generated during inflation, they must have a scale at least comparable to the preinflation Hubble length. Unless Ω0>0.94, such fluctuations could be observable in the present microwave background with a wavelength less than the present observed horizon.
Graziani Frank
Kurki-Suonio Hannu
Mathews Grant J.
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