Massive gravity: nonlinear instability of the homogeneous and isotropic universe - INSPIRE

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Massive gravity: nonlinear instability of the homogeneous and isotropic universe

Antonio De Felice
(
- Naresuan U. and
- ThEP, Bangkok
)
,
A.Emir Gumrukcuoglu
(
- Tokyo U., IPMU
)
,
Shinji Mukohyama
(
- Tokyo U., IPMU
)

Jun, 2012

4 pages

Published in:

Phys.Rev.Lett. 109 (2012) 171101

e-Print:

1206.2080 [hep-th]

DOI:

10.1103/PhysRevLett.109.171101

Report number:

IPMU12-0118

View in:

ADS Abstract Service

reference search266 citations

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Abstract: (arXiv)

We argue that all homogeneous and isotropic solutions in nonlinear massive gravity are unstable. For this purpose, we study the propagating modes on a Bianchi type--I manifold. We analyze their kinetic terms and dispersion relations as the background manifold approaches the homogeneous and isotropic limit. We show that in this limit, at least one ghost always exists and that its frequency tends to vanish for large scales, meaning that it cannot be integrated out from the low energy effective theory. This ghost mode is interpreted as a leading nonlinear perturbation around a homogeneous and isotropic background.

Note:

4 pages, uses REVTeX4.1/ v2: minor update to match the published version

gravitation: massive
stability: nonlinear
background
ghost
dispersion relation
anisotropy
kinetic
field equations

References(16)

Figures(0)

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