BRS structure of Simple Model of Cosmological Constant and Cosmology
arXiv:1702.07063 · doi:10.1103/PhysRevD.96.024009
Abstract
In arXiv:1601.02203, a simple model has been proposed in order to solve one of the problems related with the cosmological constant. The model is given by a topological field theory and the model has an infinite numbers of the BRS symmetries. The BRS symmetries are, however, spontaneously broken in general. In this paper, we investigate the BRS symmetry in more details and show that there is one and only one BRS symmetry which is not broken and the unitarity can be guaranteed. In the model, the quantum problem of the vacuum energy, which may be identified with the cosmological constant, reduces to the classical problem of the initial condition. In this paper, we investigate the cosmology given by the model and specify the region of the initial conditions which could be consistent with the evolution of the universe. We also show that there is a stable solution describing the de Sitter space-time, which may explain the accelerating expansion in the current universe.
LaTeX 10 pages, 3 figures, the version to appear in Physical Review D
References in corpus (11)
- Transverse Fierz-Pauli symmetry
- The Renormalization Group flow of unimodular f(R) gravity
- Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences
- On the UV structure of quantum unimodular gravity
- Cosmological Perturbations in Unimodular Gravity
- A New Solution of The Cosmological Constant Problems
- Longitudinal diffeomorphisms obstruct the protection of vacuum energy
- A flat space-time model of the Universe
- Density-metric unimodular gravity:vacuum spherical symmetry
- Pseudo-redundant vacuum energy
- de Sitter spacetime with a Becchi-Rouet-Stora quartet