Dynamical system analysis for a nonminimal torsion-matter coupled gravity

Sante Carloni, Francisco S. N. Lobo, Giovanni Otalora, and Emmanuel N. Saridakis
Phys. Rev. D 93, 024034 – Published 19 January 2016

Abstract

In this work, we perform a detailed dynamical analysis for the cosmological applications of a nonminimal torsion-matter coupled gravity. Two alternative formalisms are proposed, which enable one to choose between the easier approach for a given problem, and furthermore, we analyze six specific models. In general, we extract fixed points corresponding either to dark-matter-dominated, scaling decelerated solutions, or to dark-energy-dominated accelerated solutions. Additionally, we find that there is a small parameter region in which the model can experience the transition from the matter epoch to the dark-energy era. These features are in agreement with the observed evolution of the Universe, and make the theory a successful candidate for the description of nature.

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  • Received 28 December 2015

DOI:https://doi.org/10.1103/PhysRevD.93.024034

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear DynamicsGravitation, Cosmology & Astrophysics

Authors & Affiliations

Sante Carloni1,*, Francisco S. N. Lobo2,†, Giovanni Otalora3,4,‡, and Emmanuel N. Saridakis5,6,§

  • 1Centro Multidisciplinar de Astrofisica—CENTRA, Instituto Superior Tecnico—IST, Universidade de Lisboa—UL, Avenida Rovisco Pais 1, 1049-001 Lisbon, Portugal
  • 2Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016 Lisbon, Portugal
  • 3Departamento de Matemática, ICE, Universidade Federal de Juiz de Fora, Minas Gerais 36036-330, Brazil
  • 4Instituto de Física Teórica, UNESP-Universidade Estadual Paulista Caixa Postal 70532-2, 01156-970 São Paulo, Brazil
  • 5CASPER, Physics Department, Baylor University, Waco, Texas 76798-7310, USA
  • 6Instituto de Física, Pontificia Universidad de Católica de Valparaíso, Casilla 4950, Valparaíso, Chile

  • *sante.carloni@tecnico.ulisboa.pt
  • fslobo@fc.ul.pt
  • giovanni@ift.unesp.br
  • §Emmanuel_Saridakis@baylor.edu

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Vol. 93, Iss. 2 — 15 January 2016

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