Quantum Inflation?

Details Quantum Inflation? Quantum Inflation?

1994-08-10

arxiv.org/abs/hep-ph/9408267v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, prep. TUM-HEP-207/94, 4 uuencoded tar-compressed figures

Scientific paper

We consider curved space quantum corrections to the equations of motion of the inflaton field in the early Universe. Using the stochastic formalism in phase space, we demonstrate that the quantum corrected evolution of the inflaton can differ dramatically from its classical evolution when the mass scales in the potential become large, which is naturally the case in fundamental theories describing Planck scale physics. Using the example of the cosine potential, we show that the prolonged, perhaps even eternal, quantum--inflationary period is expected with a significant probability. This feature of Planck scale potentials can be dangerous, but it offers also a possibility of creating the inflationary phase in string or supergravity models, where no natural realization of inflation has been found so far.

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