A thermal interpretation of the cosmological constant

Details A thermal interpretation of the cosmological constant A thermal interpretation of the cosmological constant

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cqgra...5..521g&link_type=abstract

Classical and Quantum Gravity (ISSN 0264-9381), vol. 5, March 1, 1988, p. 521-531.

Mathematics

Logic

76

Cosmology, Gravitation Theory, Metric Space, Minkowski Space, Thermophysical Properties, Covariance, Isotropism, Vacuum

Scientific paper

A metric-affine geometrical structure is used to formulate a generalized theory of gravity, in which the motion of a test particle is characterized by a finite proper acceleration in the local tangent space. According to the local equivalence, valid for quantum systems, between acceleration and temperature, the theory is thermally interpreted as an effective classical description of the finite temperature geometry experienced by quantum fields at a microscopic level. In the macroscopic limit, the averaged contribution of the temperature to the effective geometry is represented by a cosmological constant, which can be interpreted then as a measure of the intrinsic temperature of the vacuum. With this interpretation it seems possible to understand why, on a cosmic scale, the current value of the cosmological constant must be so small, as implied by present observations.

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