Phenomenological Gravitational Phase Transition: Early and Late Modifications

Understand

In this work we generalize the idea of a gravitational phase transition or GPT at late times to allow for a modified gravity scenario in the early universe as well.

• The original GPT was shown to simultaneously relax the $H_0$ and $\sigma_8$ tensions and {\it Planck} internal inconsistencies.
• However, the primary results from GPT predictions implied disagreement with the data from the baryonic acoustic oscillations (BAO).
• Here we investigate whether the generalized GPT scenario could address the Hubble tension in the presence of the BAO data as well.