Inflation with generalized initial conditions

Details Inflation with generalized initial conditions Inflation with generalized initial conditions

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvd..35..429a&link_type=abstract

Physical Review D (Particles and Fields), Volume 35, Issue 2, 15 January 1987, pp.429-434

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38

Particle-Theory And Field-Theory Models Of The Early Universe, Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Spontaneous Breaking Of Gauge Symmetries

Scientific paper

In many current models of the early Universe a scalar field φ which is only very weakly coupled to other quantum fields is used to generate inflation. In such models there are no forces which could thermalize the scalar field, and previous assumptions about its preinflation ``initial'' conditions must be abandoned. In this paper the onset of inflation is studied classically for more general initial conditions of the scalar field configuration. In particular, initial conditions with a nonvanishing spatial average of φ, with φ chosen at random in each initial horizon volume, and with random initial momenta are considered. We identify and discuss several mechanisms that can drive these more general initial conditions toward an inflationary state. The analysis is done in one spatial dimension.

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