Inflation and cyclotron motion

Jeff Greensite
Phys. Rev. D 95, 023506 – Published 10 January 2017

Abstract

We consider, in the context of a braneworld cosmology, the motion of the Universe coupled to a four-form gauge field, with constant field strength, defined in higher dimensions. It is found, under rather general initial conditions, that in this situation there is a period of exponential inflation combined with cyclotron motion in the inflaton field space. The main effect of the cyclotron motion is that slow roll conditions on the inflaton potential, which are typically necessary for exponential inflation, can be evaded. There are Landau levels associated with the four-form gauge field, and these correspond to quantum excitations of the inflaton field satisfying unconventional dispersion relations.

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  • Received 22 July 2016

DOI:https://doi.org/10.1103/PhysRevD.95.023506

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Jeff Greensite

  • Physics and Astronomy Department, San Francisco State University, San Francisco, California 94132, USA

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Issue

Vol. 95, Iss. 2 — 15 January 2017

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