Non-perturbative Unitarity of Gravitational Higgs Mechanism
High Energy Physics - Theory
2011-10-12 v3 General Relativity and Quantum Cosmology
Abstract
In this paper we discuss massive gravity in Minkowski space via gravitational Higgs mechanism, which provides a non-perturbative definition thereof. Using this non-perturbative definition, we address the issue of unitarity by studying the full nonlinear Hamiltonian for the relevant metric degrees of freedom. While perturbatively unitarity is not evident, we argue that no negative norm state is present in the full nonlinear theory.
Keywords
Cite
@article{arxiv.1102.4991,
title = {Non-perturbative Unitarity of Gravitational Higgs Mechanism},
author = {Alberto Iglesias and Zurab Kakushadze},
journal= {arXiv preprint arXiv:1102.4991},
year = {2011}
}
Comments
15 pages, Phys. Rev. D version