Thermodynamically consistent entropic late-time cosmological
  acceleration
  Entropic-force cosmology provides, in contrast with dark energy descriptions,
a concrete physical understanding of the accelerated expansion of the universe.
The acceleration appears to be a consequence of the entropy associated with the
information storage in the universe. Since these cosmological models are unable
of explaining the different periods of acceleration and deceleration unless a
correction term is considered, we study the effects of including a subdominant
power-law term within a thermodynamically admissible entropic-force model. The
temperature of the universe horizon is obtained by a clear physical principle,
i.e., requiring that the Legendre structure of thermodynamics is preserved. We
analyze the various types of behaviors, and we compare the performance of
thermodynamically consistent entropic-force models with regard to available
supernovae data by providing appropriate constraints for optimizing alternative
entropies and temperatures of the Hubble screen. The novelty of our work is
that the analysis is based on a entropy scaling with an arbitrary power of the
Hubble radius, instead of a specific entropy. This allows us to conclude on
various models at once, compare them, and conserve the scaling exponent as a
parameter to be fitted with observational data, thus providing information
about the form of the actual cosmological entropy and temperature. We show that
the introduced correction term is capable of explaining different periods of
acceleration and deceleration in the late-time universe.
