Quantum inflaton dynamics

Dongsu Bak; Sang Pyo Kim; Sung Ku Kim; Kwang Sup Soh; Jae Hyung Yee

doi:10.1103/PhysRevD.59.027301

Quantum inflaton dynamics

Dongsu Bak, Sang Pyo Kim, Sung Ku Kim, Kwang Sup Soh, Jae Hyung Yee

Department of Physics

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5 Scopus citations

Abstract

We show that the quantum dynamics of a real scalar field for a large class of potentials in the symmetric Gaussian state, where 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]. A proposal is put forward that the symmetric Gaussian state with a nearly minimal uncertainty and a large quantum fluctuation, as an initial condition, naturally explains most of the essential features of the early stage of the inflationary universe.

Original language	English
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	59
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevD.59.027301
State	Published - 1999

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10.1103/PhysRevD.59.027301

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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 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]. A proposal is put forward that the symmetric Gaussian state with a nearly minimal uncertainty and a large quantum fluctuation, as an initial condition, naturally explains most of the essential features of the early stage of the inflationary universe.",

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Quantum inflaton dynamics

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