4 papers
Inflationary Solutions in Nonminimally Coupled Scalar Field Theory
Seoktae Koh, Sang Pyo Kim, Doo Jong Song
We study analytically and numerically the inflationary solutions for various type scalar potentials in the nonminimally coupled scalar field theory. The Hamilton-Jacobi equation is…
Nonlinear Evolutions and Non-Gaussianity in Generalized Gravity
Seoktae Koh, Sang Pyo Kim, Doo Jong Song
We use the Hamilton-Jacobi theory to study the nonlinear evolutions of inhomogeneous spacetimes during inflation in generalized gravity. We find the exact solutions to the lowest o…
Shock-Heated Gas in the Large Scale Structure of the Universe
Hyesung Kang, Dongsu Ryu, Renyue Cen +1
Cosmological shock waves play a major role in heating baryonic gas in the large scale structure of the universe. In this contribution we study the shock-heated gas in connection wi…
Gravitational Wave Spectrum in Inflation with Nonclassical States
Seoktae Koh, Sang Pyo Kim, Doo Jong Song
The initial quantum state during inflation may evolve to a highly squeezed quantum state due to the amplification of the time-dependent parameter, , which may be the…