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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:47 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Dynamical analysis of string-inspired teleparallel cosmology
Authors:
Sebastian BAHAMONDE (1), Mihai MARCIU (2), Sergei D. ODINTSOV (3), Prabir RUDRA (4)
Affiliation:
1) Laboratory of Theoretical Physics, Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411 Tartu, Estonia, Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics, 634050 Tomsk, Russia (TUSUR) and Department of Mathematics, University College London, Gower Street, London, WC1E 6BT, United Kingdom
2) Faculty of Physics, University of Bucharest, Romania
3) Institut de Ciencies de lEspai (IEEC-CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Cerdanyola del Valles, Barcelona, Spain, ICREA, Passeig LluAs Companys, 23, 08010 Barcelona, Spain, Tomsk State Pedagogical University, 634061 Tomsk, Russia and Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics, 634050 Tomsk, Russia (TUSUR)
4) Department of Mathematics, Asutosh College, Kolkata-700026, India
E-mail
sbahamonde@ut.ee, sebastian.beltran.14@ucl.ac.uk
Keywords:
cosmology, dark energy, accelerated expansion, teleparallel, string theory
Abstract:
In this work we analyze the phase space structure for a cosmological model constructed in the framework of teleparallel gravity which is based on specific couplings with the teleparallel Gauss-Bonnet invariants. The investigation showed that this model can explain the accelerated expansion of our Universe and the evolution at the cosmic level, offering a possible theoretical alternative to the cosmological constant. In the last part of our presentation we investigate the present model from a numerical point of view, revealing some possible trajectories in the phase space structure, corresponding to specific representations of the effective equation of state. The presentation is based on our recent work [1].
References:
[1] String-inspired Teleparallel cosmology, S. Bahamonde, M. Marciu, S.D. Odintsov, P. Rudra, Nuclear Physics B 962, 115238, (2021).
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