Primordial Black Holes With Multi-Modal Mass Spectra
arXiv:1811.06532 · doi:10.1103/PhysRevD.99.103535
Abstract
A mechanism for generating primordial black-hole mass spectra with many spikes is proposed and investigated. This mechanism relies on the choice of non-Bunch-Davies vacua, these leading to oscillatory features in the inflationary power spectrum. This in turn generates oscillations in the primordial black-hole mass function with exponentially enhanced spikes. This ``multimodal'' effect is demonstrated for most of the well-studied models of primordial black-hole formation.
18 pages, 5 figures; v2: minor changes to match published version
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