Classical Solutions of Ghost Condensation Models
arXiv:0801.0827 · doi:10.1142/S0217984908017655
Abstract
Motivated by ideas obtained from both ghost condensation and gravitational Higgs mechanism, we attempt to find classical solutions in the unitary gauge in general ghost condensation models. It is shown that depending on the form of scalar fields in an action, there are three kinds of exact solutions, which are (anti-) de Sitter space-time, polynomially expanding universes and flat Minkowski space-time. We briefly comment on gravitational Higgs mechanism in these models where we have massive gravitons of 5 degrees of freedom and 1 unitary scalar field (Nambu-Goldstone boson) after spontaneous symmetry breakdown of general coordinate reparametrization invariance. The models at hand are free from the problem associated with the non-unitary propagating mode.
9 pages, no figures
References in corpus (8)
- A Higgs Mechanism for Gravity
- Hidden Gravity in Open-String Field Theory
- The Higgs sector of gravitational gauge theories
- Unitarity in the Brout-Englert-Higgs Mechanism for Gravity
- Gravitational Higgs Mechanism
- Massive Gravity in Minkowski Space via Gravitational Higgs Mechanism
- Gravity, p-branes and a spacetime counterpart of the Higgs effect
- Gravitational Higgs Mechanism with a Topological Term
Cited by in corpus (7)
- The Higgs Phenomenon in Quantum Gravity
- On Unitarity of Massive Gravity in Three Dimensions
- Renormalizability of Massive Gravity in Three Dimensions
- Massive Gravity with Mass Term in Three Dimensions
- Remarks on Higgs Mechanism for Gravitons
- Higgs Mechanism for Gravitons
- Renormalizability of Topologically Massive Gravity