Cosmological inviability of f(R,T) gravity

Cosmological inviability of f(R,T) gravity Among many alternative gravitational theories to General Relativity (GR), f(R,T) gravity (where R is the Ricci scalar and T the trace of the energy-momentum tensor) has been widely studied recently. By adding a matter contribution to the gravitational Lagrangian, f(R,T) theories have become an interesting extension to GR displaying a broad phenomenology in astrophysics and cosmology. In this paper, we discuss, however, the difficulties appearing in explaining a viable and realistic cosmology within the f(R,T) class of theories. Our results challenge the viability of f(R,T) as an alternative modification of gravity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Cosmological inviability of f(R,T) gravity

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Cosmological inviability of f(R,T) gravity

Abstract

Among many alternative gravitational theories to General Relativity (GR), f(R,T) gravity (where R is the Ricci scalar and T the trace of the energy-momentum tensor) has been widely studied recently. By adding a matter contribution to the gravitational Lagrangian, f(R,T) theories have become an interesting extension to GR displaying a broad phenomenology in astrophysics and cosmology. In this paper, we discuss, however, the difficulties appearing in explaining a viable and realistic cosmology within the f(R,T) class of theories. Our results challenge the viability of f(R,T) as an alternative modification of gravity.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.95.123536
Publisher site
See Article on Publisher Site

Abstract

Among many alternative gravitational theories to General Relativity (GR), f(R,T) gravity (where R is the Ricci scalar and T the trace of the energy-momentum tensor) has been widely studied recently. By adding a matter contribution to the gravitational Lagrangian, f(R,T) theories have become an interesting extension to GR displaying a broad phenomenology in astrophysics and cosmology. In this paper, we discuss, however, the difficulties appearing in explaining a viable and realistic cosmology within the f(R,T) class of theories. Our results challenge the viability of f(R,T) as an alternative modification of gravity.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jun 15, 2017

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