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Paper detail

Electromagnetic coupling effects in natural inflation

In this work we study the effects of the electromagnetic coupling in natural inflation in a systematic manner using the Schwinger-Keldysh formalism. The corresponding influence functional is evaluated to one-loop level. It can be interpreted as due to a single stochastic force. The equation of motion of the inflaton field is therefore given in the form of a Langevin equation. Lastly, the two-point and the three-point correlation functions of the inflaton field are worked out. They are related to the power spectrum and the nongaussianity of the inflaton field, respectively.

preprint2019arXivOpen access
Hing-Tong ChoKin-Wang Ng
gr-qchep-th
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Hing-Tong ChoKin-Wang Ng

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