RT Journal Article
T1 Isotropy theorem for arbitrary-spin cosmological fields
A1 López Maroto, Antonio
A1 Ruiz Cembranos, José Alberto
A1 Nuñez Jareño, Santos José
AB We show that the energy-momentum tensor of homogeneous fields of arbitrary spin in an expanding universe is always isotropic in average provided the fields remain bounded and evolve rapidly compared to the rate of expansion. An analytic expression for the average equation of state is obtained for Lagrangians with generic power-law kinetic and potential terms. As an example we consider the behavior of a spin-two field in the standard Fierz-Pauli theory of massive gravity. The results can be extended to general space-time geometries for locally inertial observers.
PB Iop Publishing Ltd
SN 1475-7516
YR 2014
FD 2014-03
LK https://hdl.handle.net/20.500.14352/33584
UL https://hdl.handle.net/20.500.14352/33584
LA eng
NO © 2014 IOP Publishing Ltd.This work has been supported by MICINN (Spain) project numbers FIS2011-23000, FPA2011-27853-01 and Consolider Ingenio MULTIDARK CSD2009-00064.
NO MICINN (Spain)
DS Docta Complutense
RD 21 abr 2025