Accelerated cosmic expansion in a scalar-field universe (2009)
Bhattacharya, Swastik, Joshi, Pankaj S., Nakao, Ken-ichi
We consider here a spherically symmetric but inhomogeneous universe filled with a massless scalar field. The model obeys two constraints. The first one is that the gradient of the scalar field is...
An eternally collapsing scalar field universe (2008)
Bhattacharya, Swastik, Goswami, Rituparno, Joshi, Pankaj
We study here the evolution of a massless scalar field universe, developing from a regular initial spacelike surface. The Einstein equations and regularity and boundary conditions governing the same...