The role of an invariant IR cutoff in late time cosmological dynamics
  We study the role of an invariant infra-red cutoff in the late time
cosmological dynamics. This low energy cutoff originates from the existence of
a minimal measurable uncertainty as a result of the curvature of background
manifold, and can be encoded in an extended uncertainty relation. Inspired by
black hole entropy-area relation, we extend the analysis to the thermodynamics
of apparent horizon of the universe. By treating both the Newtonian and general
relativistic cosmologies, we show that the contribution of infra-red cutoff in
the equations of dynamics can be interpreted as an effective fluid which is
capable of explaining late time cosmic speed up and even transition to a
phantom phase of expansion. We use the latest observational data from
PLANCK2018 to constrain the parameter of an extended uncertainty relation.
