Entropy Production, Information Generation and Evolution in the Expanding Universe

Abstract

Information generating processes in the expanding universe are discussed on the basis of laboratory physics, in which the cosmic expansion was treated as the boundary conditions. Two important processes are shown to operate ; dropping-out of the changing constraints due to the cosmic expansion, and gravothermal catastrophe of self-gravitating subsystems such as the stars. The cosmic expansion and resultant decoupling of gas from radiation is a prerequisite or a necessary condition for initiating the gravothermal catastrophe. Such approach reveals a clear understanding of the reasons why the universe is out of thermal equilibrium and why diversities are being generated in the universe rather than approaching towards the thermal death.