A quasi-de Sitter inflationary phase cannot remain free of spin-2 ghosts for longer than the smaller of a classical slow-roll time and a quantum-diffusion time, both polynomial in 1/H.
Pauli-Fierz Gravitons on Friedmann-Robertson-Walker Background
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We derive the Hamiltonian describing Pauli-Fierz massive gravitons on a flat Friedmann-Robertson-Walker (FRW) cosmology in a particular, non-generic effective field theory. The cosmological evolution is driven by a scalar field Phi with an arbitrary potential V(Phi). The model contains two coupled scalar modes, corresponding to the fluctuations of Phi and to the propagating scalar component of the Pauli-Fierz graviton. In order to preserve the full gauge invariance of the massless version of the theory, both modes have to be taken into account. We canonically normalize the Hamiltonian and generalize the Higuchi bound to FRW backgrounds. We discuss how this bound can set limits on the value of the Pauli-Fierz mass parameter. We also observe that on a generic FRW background the speed of propagation of the scalar mode of the graviton is always smaller than the speed of light.
fields
hep-th 1years
2026 1verdicts
ACCEPT 1representative citing papers
citing papers explorer
-
Distance-Higuchi Bounds on Inflationary Field Ranges and Lifetimes
A quasi-de Sitter inflationary phase cannot remain free of spin-2 ghosts for longer than the smaller of a classical slow-roll time and a quantum-diffusion time, both polynomial in 1/H.