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The Chaplygin Gas as a Model for f(T) Gravitation? | Shambel Sahlu
; Joseph Ntahompagaze
; Maye Elmardi
; Amare Abebe
; | Date: |
22 Apr 2019 | Abstract: | This paper explores the possibility of treating the exotic Chaplygin-gas (CG)
fluid model as some manifestation of an f(T) gravitation. To this end, we use
the different cosmological CG equations of state, compare them with the
equation of state for the modified teleparallel, i.e. f(T), gravity and
reconstruct the corresponding f (T) Lagrangian densities. We then explicitly
derive the equation of state parameter of the torsion fluid w T and study its
evolution for vacuum-torsion, radiation-torsion, dust-torsion, stiff
fluid-torsion and radiation-dust-torsion multi-fluid systems. The preliminary
results show that, in addition to providing Chaplygin-gas-like solutions to f
(T), which naturally behave like dark matter and dark energy at early and late
times respectively, the technique can be used to overcome some of the
challenges attributed to the CG cosmological alternative. | Source: | arXiv, 1904.9897 | Services: | Forum | Review | PDF | Favorites |
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