Higher spin fields and the problem of cosmological constant

Details Higher spin fields and the problem of cosmological constant Higher spin fields and the problem of cosmological constant

1996-08-27

arxiv.org/abs/astro-ph/9608175v1

Phys.Rev.D55:5881-5885,1997

Astronomy and Astrophysics

Astrophysics

15 pages, Latex twice

Scientific paper

10.1103/PhysRevD.55.5881

The cosmological evolution of free massless vector or tensor (but not gauge) fields minimally coupled to gravity is analyzed. It is shown that there are some unstable solutions for these fields in De Sitter background. The back reaction of the energy-momentum tensor of such solutions to the original cosmological constant exactly cancels the latter and the expansion regime changes from the exponential to the power law one. In contrast to the adjustment mechanism realized by a scalar field the gravitational coupling constant in this model is time-independent and the resulting cosmology may resemble the realistic one.

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