Emil Martinec, Peter Adshead, Mark Wyman
We propose a new, generic mechanism of inflation mediated by a balance between potential forces and a Chern-Simons interaction. Such quasi-topological interactions are ubiquitous in string theory. In the minisuperspace approximation, their effect on the dynamics can be mapped onto the problem of a charged particle in an electromagnetic field together with an external potential; slow roll arises when the motion is dominated by the analogue of 'magnetic drift'. This mechanism appears to be the generic mechanism of inflation in string theory, and is robust against radiative corrections. We suggest a possible experimental signature which, if observed, might be considered strong evidence for string theory.
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http://arxiv.org/abs/1206.2889
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