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2009•International Journal of Modern Physics DOpen access

ENERGY CONDITIONS IN f(R) GRAVITY AND BRANS–DICKE THEORIES

Khedmat Atazadeh, A. KHALEGHI, Hamid Reza Sepangi, Yaser Tavakoli

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Abstract

The equivalence between f(R) gravity and scalar–tensor theories is invoked to study the null, strong, weak and dominant energy conditions in Brans–Dicke theory. We consider the validity of the energy conditions in Brans–Dicke theory by invoking the energy conditions derived from a generic f(R) theory. The parameters involved are shown to be consistent with an accelerated expanding universe.

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The equivalence between f(R) gravity and scalar–tensor theories is invoked to study the null, strong, weak and dominant energy conditions in Brans–Dicke theory. We consider the validity of the energy conditions in Brans–Dicke theory by invoking the energy conditions derived from a generic f(R) theory. The parameters involved are shown to be consistent with an accelerated expanding universe.

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Available abstract

The equivalence between f(R) gravity and scalar–tensor theories is invoked to study the null, strong, weak and dominant energy conditions in Brans–Dicke theory. We consider the validity of the energy conditions in Brans–Dicke theory by invoking the energy conditions derived from a generic f(R) theory. The parameters involved are shown to be consistent with an accelerated expanding universe.

Key concepts: Brans–Dicke theory, Physics, Energy condition, Theoretical physics, Equivalence (formal languages), Null (SQL), Universe, Mathematical physics

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