Reheating and causal thermodynamics
نویسنده
چکیده
The reheating process in in ationary universe models is considered as an out-of-equilibrium mixture of two interacting and reacting uids, and studied within the framework of causal, irreversible thermodynamics. The evolution of the temperature and the decay rate as determined by causal thermodynamics are estimated at di erent stages of the process. A simple model is also used to nd the perturbations of the expansion rate, including the possibility of damped oscillations.
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