Quantum-field-theoretic analysis of inflation dynamics in a (2+1)-dimensional universe

Details Quantum-field-theoretic analysis of inflation dynamics in a (2+1)-dimensional universe Quantum-field-theoretic analysis of inflation dynamics in a (2+1)-dimensional universe

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..44.2335s&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 44, Issue 8, 15 October 1991, pp.2335-2355

Physics

23

Scientific paper

We reexamine inflationary scenarios based on slow-rollover transitions, which occur under various initial conditions of the inflation-driving scalar field. We examine inflation dynamics using a recently developed calculational technique for studying a quantum-field-theoretic system in an external environment that is itself changing with time. This method, based on the functional Schrödinger picture, uses a self-consistent Gaussian approximation that, unlike ordinary perturbation theory, reflects some of the nonlinearities of the full quantum theory. Our treatment is confined to planar universes, where the approximation techniques do not suffer from well-known problems associated with scalar field self-interactions in four-dimensional space-time. However, for these toy models we can present concrete and explicit results.

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