Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-28
Phys.Rev.D64:124017,2001
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, 11 figures
Scientific paper
10.1103/PhysRevD.64.124017
We consider the dynamics of a viscous cosmological fluid in the generalized Randall-Sundrum model for an isotropic brane. To describe the dissipative effects we use the Israel-Hiscock-Stewart full causal thermodynamic theory. In the limiting case of a stiff cosmological fluid with pressure equal to the energy density, the general solution of the field equations can be obtained in an exact parametric form for a cosmological fluid with constant bulk viscosity and with a bulk viscosity coefficient proportional to the square root of the energy density, respectively. The obtained solutions describe generally non-inflationary brane worlds, starting from a singular state. During this phase of evolution the comoving entropy of the Universe is an increasing function of time, and thus a large amount of entropy is created in the brane world due to viscous dissipative processes.
Chen Chiang-Mei
Harko Tiberiu
Mak Man-Kin
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