entropy and gravity
Clicks: 227
ID: 132606
2012
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Abstract
The effect of gravity upon changes of the entropy of a gravity-dominated system is discussed. In a universe dominated by vacuum energy, gravity is repulsive, and there is accelerated expansion. Furthermore, inhomogeneities are inflated and the universe approaches a state of thermal equilibrium. The difference between the evolution of the cosmic entropy in a co-moving volume in an inflationary era with repulsive gravity and a matter-dominated era with attractive gravity is discussed. The significance of conversion of gravitational energy to thermal energy in a process with gravitational clumping, in order that the entropy of the universe shall increase, is made clear. Entropy of black holes and cosmic horizons are considered. The contribution to the gravitational entropy according to the Weyl curvature hypothesis is discussed. The entropy history of the Universe is reviewed.
| Reference Key |
grn2012entropyentropy
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|---|---|
| Authors | ;Øyvind Grøn |
| Journal | European journal of medicinal chemistry |
| Year | 2012 |
| DOI |
10.3390/e14122456
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| URL | |
| Keywords |
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