Entropy at the early Universe

OSVALDO M. MORESCHI

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS

NORTH-HOLLAND

Año: 2000 vol. 80 p. 1 - 8

0920-5632

We report on the behavior of the entropy at the early Universe when the causal law is applied in the calculations of statistical mechanics. Without assuming a particular geometry, the result is that the entropy of a small unit volume tends to zero as one approaches the initial singularity. This implies that the initial data of the physical fields where asymptotically homogeneous and isotropic in that limit. It is so deduced, from Einstein equation, that the spacetime must show the same behavior as one approaches the initial singularity.