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Article overview
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Phase space analysis of the bouncing universe with stringy effects | Alfredo D. Millano
; Kimet Jusufi
; Genly Leon
; | Date: |
1 Feb 2023 | Abstract: | We use the recently modified Friedmann equations obtained from string
T-duality effects that encode the zero-point length (Phys. Lett. B 836 (2023),
137621) to study the phase space analyses of a bouncing early universe. An
important implication of such stringy effects is that they can alleviate the
initial singularity since the Raychaudhuri equation is modified. We investigate
if the Universe can undergo an accelerated expansion phase for a specific
domain of the equation of state parameter. The stringy effects are encoded in
the parameter $Gamma$, which depends not only on the zero-point length but
also on the state parameter $omega$. We construct two dynamical systems
depending on whether $-1 < omega leq -1/3$ and $omega geq -1/3$, and we
classify the equilibrium points of each system. Exact solutions and
cosmological implications are discussed. | Source: | arXiv, 2302.00223 | Services: | Forum | Review | PDF | Favorites |
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