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Quantum Inflaton Dynamics

Dongsu Bak·Sang Pyo Kim·Sung Ku Kim·Kwang-Sup Soh·Jae Hyung Yee
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Abstract

We show that the quantum dynamics of a real scalar field for a large class of potentials in the symmetric Gaussian state, where the nonperturbative quantum contributions are taken into account, can be described equivalently by a two-dimensional nonlinear dynamical system with a definite angular momentum (U(1) charge of a complex theory). It is found that the Gaussian state with a nearly minimal uncertainty and a large quantum fluctuation, as an initial condition, naturally explains the most of the essential features of the early stage of the inflationary Universe.

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Dongsu Bak, Sang Pyo Kim, Sung Ku Kim, Kwang-Sup Soh, Jae Hyung Yee. 1998-05-06. Quantum Inflaton Dynamics. https://doi.org/10.1103/physrevd.59.027301

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