On the thermodynamics of de Sitter spacetime and quasi-de Sitter spacetime
1989; IOP Publishing; Volume: 6; Issue: 6 Linguagem: Inglês
10.1088/0264-9381/6/6/014
ISSN1361-6382
AutoresM. D. Pollock, Tejinder P. Singh,
Tópico(s)Noncommutative and Quantum Gravity Theories
ResumoThe de Sitter spacetime requires a source whose uniform energy density rho and pressure p are expressible as rho =-p=12 pi 2T2H, where TH=H/2 pi is the Hawking temperature and H is the Hubble constant. By applying the first law of thermodynamics the authors show that the total entropy vanishes identically for all observers, whatever the value of rho . These considerations are extended to eternal quasi-de Sitter spacetimes. A cosmological model of super-exponential inflation, for which H)0 and Sh(0, is on exactly the same footing, from the thermodynamical point of view, as the corresponding model of sub-exponential inflation, for which H(0 and Sh)0.
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