Dynamical dark energy can explain the anomalous matter density fluctuation at $z\sim4$

Abstract

Recently, under the standard cosmological model, a new growth tension between the Planck-2018 observation and the combined observation of cosmic microwave background lensing and galaxy clustering at $z\sim4$ emerges over the $1\,\sigma$ confidence level. We demonstrate that dynamical dark energy can well solve this tension within the $1\,\sigma$ confidence level. This implies that the new measurement of large scale structure at high redshift may give the evidence of evolution of dark energy over time.