Speaker
Prof.
Inyong Cho
(SeoulTech)
Description
We investigate the homogeneous and anisotropic evolution of spacetime driven by perfect fluid with shear viscosity. We consider the simplest form of the equation of state wherein the pressure and the shear stress are proportional to the energy density individually. We consider single off-diagonal component of shear viscosity, and find that the evolution of spacetime becomes Bianchi type-I. A special case of our general solutions represents Bianchi type-VII which is equivalent to the case of three off-diagonal components. Only this case can avoid the initial singularity for some parameters. The late-time evolution exhibits slower expansions than that of the Friedmann universe. We also discuss the anisotropy.
