Cosmological constant as a free thermodynamical variable

Jarmo Mäkelä
Phys. Rev. D 87, 104040 – Published 29 May 2013

Abstract

We consider a possibility that the cosmological constant may not be a constant, but a free thermodynamical variable. To this end we construct a microscopic model of a spacelike two-sphere just inside of the cosmological horizon of the de Sitter spacetime. In our model the spacelike two-sphere in question is assumed to consist of discrete constituents, each of them contributing to the two-sphere an area, which is an integer times a constant. Using our model we obtain a thermodynamical equation of state for the cosmological constant. Our equation of state implies that the cosmological constant has a certain positive lower bound, which depends on the number of the constituents of the two-sphere.

  • Received 15 January 2013

DOI:https://doi.org/10.1103/PhysRevD.87.104040

© 2013 American Physical Society

Authors & Affiliations

Jarmo Mäkelä*

  • Vaasa University of Applied Sciences, Wolffintie 30, 65200 Vaasa, Finland

  • *jarmo.makela@puv.fi

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Vol. 87, Iss. 10 — 15 May 2013

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