Exact Dissipative Cosmologies with Stiff Fluid
M. K. Mak, T. Harko
TL;DR
This paper derives exact solutions for flat cosmological models with a bulk viscous stiff fluid using the Israel-Stewart-Hiscock theory, providing insights into dissipative effects in early universe cosmology.
Contribution
It presents the first exact solutions for dissipative flat cosmologies with a stiff fluid within the full Israel-Stewart-Hiscock framework, considering a viscosity proportional to energy density.
Findings
Exact solutions for dissipative flat cosmologies with stiff fluid.
Demonstrates the impact of bulk viscosity on cosmological evolution.
Provides a basis for further studies on dissipative effects in early universe models.
Abstract
The general solution of the gravitational field equations in the flat Friedmann-Robertson-Walker geometry is obtained in the framework of the full Israel-Stewart-Hiscock theory for a bulk viscous stiff cosmological fluid, with bulk viscosity coefficient proportional to the energy density.
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