Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-11-12
Phys.Rev.Lett.102:121301,2009
Physics
High Energy Physics
High Energy Physics - Theory
4 pages RevTeX; added references, matches published version
Scientific paper
10.1103/PhysRevLett.102.121301
We show that inflation with a quadratic potential occurs naturally in theories where an axion-like field mixes with a 4-form. Such an axion is massive, with the mass which arises from the mixing being protected by the axion shift symmetry. The 4-form backgrounds break this symmetry spontaneously and comprise a mini-landscape, where their fluxes can change by emission of membranes. Inflation can begin when the 4-form dominates the energy density. Eventually this energy is reduced by membrane emission and the axion can roll slowly towards its minimum, as in the simplest version of chaotic inflation.
Kaloper Nemanja
Sorbo Lorenzo
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