Gauge Issues in Extended Gravity and f(R) Cosmology

Дата и время публикации : 2011-12-02T21:01:10Z

Авторы публикации и институты :
Iain A. Brown
Amir Hammami

Ссылка на журнал-издание: JCAP 04 (2012) 002
Коментарии к cтатье: 12 pages, REVTeX4. Replaced with version accepted by JCAP. Citations added and some clarifications
Первичная категория: gr-qc

Все категории : gr-qc, astro-ph.CO, hep-ph

Краткий обзор статьи: We consider issues related to the conformal mapping between the Einstein and Jordan frames in f(R) cosmology. We consider the impact of the conformal transformation on the gauge of a perturbed system and show that unless the system is written in a restricted set of gauges the mapping could produce an inconsistent result in the target frame. Newtonian gauge lies within the restricted group but synchronous gauge does not. If this is not treated carefully it could in principle contaminate numerical calculations.

Category: Physics