[Submitted on 11 Nov 2022]

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    Abstract: In this work we explore the dynamical system phase space of
    Einstein-Gauss-Bonnet theory in the cosmological minisuperspace. This approach
    binds the main features of the theory through a system of autonomous
    differential equations, in the context of a flat
    Friedmann-LemaƮtre-Robertson-Walker spacetime. We analyze the critical
    points that feature in this system to assess their stability criteria. The
    phase space of this form of scalar-tensor gravity is very rich due to the
    fourth-order contributions of the Gauss-Bonnet invariant together with the
    second order contribution of the scalar field together with their coupling
    dynamics. We find additional critical points as compared with previous works in
    the literature which may be important for understanding the larger evolution of
    standard background cosmology within this class of gravitational models.

    Submission history

    From: Konstantinos Dialektopoulos F. [view email]

    Fri, 11 Nov 2022 09:14:34 UTC (2,255 KB)

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