Quantum inflaton dynamics

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

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number2
StatePublished - 1999


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