Electromagnetic coupling effects in natural inflation

14 Jul 2019  ·  Cho Hing-Tong, Ng Kin-Wang ·

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. read more

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General Relativity and Quantum Cosmology High Energy Physics - Theory