$f(R)$ Gravity and Crossing the Phantom Divide Barrier

Abstract

The $f(R)$ gravity models formulated in Einstein conformal frame are equivalent to Einstein gravity together with a minimally coupled scalar field. We shall explore phantom behavior of $f(R)$ models in this frame and compare the results with those of the usual notion of phantom scalar field.

13 Pages, 9 figures. To appear in Physics Letters B

References in corpus (10)

• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Disappearing cosmological constant in f(R) gravity
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• Cosmological Evolution of a Quintom Model of Dark Energy
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• Conditions for the cosmological viability of f(R) dark energy models
• Can dark energy evolve to the Phantom?
• Thawing quintessence with a nearly flat potential
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Cited by in corpus (3)

• Generic feature of future crossing of phantom divide in viable $f(R)$ gravity models
• Dilaton Dark Energy Model in f(R), f(T) and Horava-Lifshitz Gravities
• Crossing Phantom Boundary in $f(R)$ Modified Gravity : Jordan Frame vs Einstein Frame