Accelerated expansion from cosmological holography

Abstract It is shown that holographic cosmology implies an evolving Hubble radius c^-1Ṙ ₇ = -1 + 3 ₌ in the presence of a dimensionless matter density Ωm scaled to the closure density 3H2/8πG, where c denotes the velocity of light and H and G denote the Hubble parameter and Newton's constant. It reveals a dynamical dark energy and a sixfold increase in gravitational attraction to matter on the scale of the Hubble acceleration. It reproduces the transition redshift zt ≃ 0. 4 to the present epoch of accelerated expansion and is consistent with (q0, (dq/dz) 0) of the deceleration parameter q (z) = q0 + (dq/dz) 0z observed in Type Ia supernovae.