LIN M. -X.

We discuss the phenomenological imprints of modifications to gravity in the early Universe with a specific focus on the time of recombination. We derive several interesting results regarding the effect that such modifications have on cosmological observables, especially on the driving and phasing of acoustic oscillations, observed in the cosmic...

The canonical acoustic dark energy model (cADE), which is based on a scalar field with a canonical kinetic term that rapidly converts potential to kinetic energy around matter radiation equality, alleviates the Hubble tension found in ΛCDM. We show that it successfully passes new consistency tests in the cosmic microwave background (CMB)...

We discuss the ability of a dark fluid becoming relevant around the time of matter-radiation equality to significantly relieve the tension between local measurements of the Hubble constant and cosmic microwave background (CMB) inference, within the ΛCDM model. We show that the gravitational impact of acoustic oscillations in the dark fluid...