Cosmology of unimodular Born-Infeld- gravity
arXiv:2402.08951 · doi:10.1016/j.dark.2024.101445
Abstract
We propose a novel modified gravity: unimodular generalization of the Born-Infeld- gravity within the framework of cosmology. After formulating the action corresponding to the generalized Born-Infeld- gravity, we present a reconstruction scheme of this unimodular extension to achieve various cosmological eras of the universe. Interestingly, the unimodular generalization of Born-Infeld- gravity proves to be suitable for inflation (de-Sitter and quasi de-Sitter) along with power law cosmology which actually includes from reheating to the Standard Big-Bang cosmology. Apart from the inflation, such generalized Born-Infeld- theory is also capable to trigger non-singular bouncing cosmology for suitable forms of the unimodular Lagrange multiplier, which are exotic for the standard Einstein-Hilbert gravity and cannot be realized in that case. The possible consequences are discussed.
arXiv comment18 pages, 4 figures. Accepted by Physics of the Dark Universe
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