Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/89249
Title: Reconstruction from scalar-tensor theory and the inhomogeneous equation of state in f (T) gravity
Authors: Said, Jackson
Keywords: Scalar field theory
Calculus of tensors
General relativity (Physics)
Field theory (Physics)
Gravity -- Mathematical models
Issue Date: 2017
Publisher: Springer
Citation: Said, J. L. (2017). Reconstruction from scalar–tensor theory and the inhomogeneous equation of state in f (T) gravity. The European Physical Journal C, 77(12), 1-8.
Abstract: General relativity (GR) characterizes gravity as a geometric properly exhibited as curvature on spacetime. Teleparallelism describes gravity through torsional properties, and can reproduce GR at the level of equations. Similar to f (R) gravity, on taking a generalization, f (T ) gravity can produce various modifications its gravitational mechanism. The resulting field equations are inherently distinct to f (R) gravity in that they are second order. In the present work, f (T ) gravity is examined in the cosmological context with a number of solutions reconstructed by means of an auxiliary scalar field. To do this, various forms of the Hubble parameter are considered with an f (T ) Lagrangian emerging for each instance. In addition, the inhomogeneous equation of state (EoS) is investigated with a particular Hubble parameter model used to show how this can be used to reconstruct the f (T ) Lagrangian. Observationally, the auxiliary scalar field and the exotic terms in the FRWfield equations give the same results,meaning that the variation in the Hubble parameter may be interpreted as the need to reformulate gravity in some way, as in f (T ) gravity.
URI: https://www.um.edu.mt/library/oar/handle/123456789/89249
Appears in Collections:Scholarly Works - InsSSA



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