High-redshift Mini-haloes from Modulated Preheating

Intermittent type of primordial non-Gaussian fluctuations from modulated preheating can produce an overabundance of $\sim {10}^8{M}_{\odot }$ mini-haloes at high redshift $z\gtrsim 20$. This may have a significant impact on the formation of high-redshift supermassive black holes.