High-redshift JWST massive galaxies and the initial clustering of supermassive primordial black holes

In this paper, we show that the initial clustering of supermassive primordial black holes (SMPBHs) beyond a Poisson distribution can efficiently enhance the matter power spectrum, and thus the halo mass function. As a result, the population of initially clustered SMPBHs with $M_{\mathrm{P}\mathrm{B}\mathrm{H}}\sim {10}^9{M}_{\odot }$ and the fraction of energy density $f_{\mathrm{P}\mathrm{B}\mathrm{H}}\sim {10}^{-3}$ (consistent with current constraints on SMPBHs) has the potential to naturally explain high-redshift massive galaxies observed by the James Webb Space Telescope.