Abstract
We consider a massive scalar field with arbitrary coupling in space, which mimics the thermal expanding Universe, and calculate explicitly all relevant thermodynamical functions in the low- and high-temperature regimes, extending previous analysis of entropy bounds and entropy/energy ratios performed in the conformal case. For high temperatures, new mass-dependent entropy ratios are established which, different from the conformal limit, satisfy Bekenstein’s and Verlinde’s bounds in the physical region.
- Received 21 February 2003
DOI:https://doi.org/10.1103/PhysRevD.67.124014
©2003 American Physical Society