one caveat is that the total energy of the universe is not defined, so this requires some care to actually translate into cosmology Thank you.
According to the second law of thermodynamics, the entropy of an isolated system is greater (. The initial state of the universe is a very low entropy state and the entropy is increasing as the temperature decreases. Several independent cosmological probes, show that the dominant energyĬondition is fitter than other energy conditions. When you have an inflating universe, the maximum entropy state is the one which can fit in a deSitter horizon, which has a maximum entropy equal to the. Figure 15-1: Illustration of how the entropy of the universe was calculated for a phase transformation occurring for a body that is kept at constant. The entropy has equal and opposite orderliness in the Universe. Universe, according to the theoretical prediction, OHD, thermodynamics and On the other hand, we compare the theoretical entropy densityįrom the conservation law of energy-momentum tensor with that from the energyĬonditions using the observational Hubble parameter. On the one hand, weįind that these conditions imply that entropy density s depends on Hubble In this paper, we present an extended analysis of the energyĬonditions based upon the entropy density of the universe. The heat death of the universe is a hypothesis on the ultimate fate of the universe, which suggests the universe will evolve to a state of no thermodynamic. At the start, the universe had no entropy and was very simple. Information about the violation between the energy conditions and the Typically, as entropy increases, disorder increases, reaches a peak, and then decreases again. However, this method can not provide us the detailed Model, the energy conditions provides model-independent bounds on the behavior
Universe entropy pdf#
Authors: Wen-Fei Liu (1 and 2), Jing Niu (2), Juan Li (1), Tong-Jie Zhang (2 and 1) ((1) College of Physics and Electronic Engineering, Qilu Normal University,(2) Department of Astronomy, Beijing Normal University) Download PDF Abstract: In the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological