2023 Impact factor 4.2
Particles and Fields

Eur. Phys. J. C 20, 139-146
DOI: 10.1007/s100520100625

Decay of cosmological constant in self-consistent inflation

I. Dymnikova1 and M. Khlopov2, 3

1  Institute of Mathematics and Informatics, University of Warmia and Mazury in Olsztyn, Zolnierska 14, 10-561 Olsztyn, Poland
2  Center for CosmoParticle Physics "Cosmion" , 125047 Moscow, Russia
3  Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France

(Received: 28 September 2000 / Revised version: 16 January 2001 / Published online: 25 April 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

The symmetric vacuum state in gauge theories with spontaneous symmetry breaking is symmetric in both internal and space-time variables. We consider this vacuum state as a Bose condensate of physical Higgs particles, defined over an asymmetric vacuum state, and identify the energy density of their self-interaction with the cosmological constant $ \Lambda $ in the Einstein equation. In this picture, spontaneous symmetry breaking proceeds as $ \Lambda $ decay. Decoherence of coherent oscillations of a scalar field in the course of $ \Lambda $ decay provides the effective mechanism for damping of coherent oscillations, leading to the regime of slow evaporation of a Bose condensate. This mechanism is responsible for self-consistent inflation without fine-tuning of the potential parameters. The physical self-consistency in this model is provided by incorporating the origin of the cosmological constant in the dynamics of spontaneous breaking of particle symmetries.

© Società Italiana di Fisica, Springer-Verlag 2001