Naslov
Renormalization-group running cosmologies and the generalized second law

Autori
Horvat, Raul

Izvornik
Physics Letters B (0370-2693) 648 (2007), 5-6; 374-377

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
dark energy; generalized second law

Sažetak
We explore some thermodynamical consequences of accelerated universes driven by a running cosmological constant (CC) from the renormalization group (RG). Application of the generalized second law (GSL) of gravitational thermodynamics to a framework where the running of the CC goes at the expense of energy transfer between vacuum and matter, strongly restricts the mass spectrum of a (hypothetical) theory controlling the CC running. We find that quantum effects driving the running of the CC should be dominated by a trans-Planckian mass field, in marked contrast with the GUT-scale upper mass bound obtained by analyzing density perturbations for the running CC. The model shows compliance with the holographic principle.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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