Gaussian Planck Relics are Ruled-Out as Dark Matter by LIGO

Abstract

Quantum Gravity models suggest that singularities in gravitational collapse can be replaced by bounces, leading to the formation of Planck star remnants (PSR) that survive as stable relics once the black holes evaporate to the Planck mass. Recently, we proposed that such relics can be a viable candidate for dark matter. Here we show that LIGO's upper limit on the gravitational wave background rules out a formation pathway of Planck mass relics as dark matter from Gaussian initial conditions. This leaves non-Gaussian primordial fluctuations as the only viable channel for making Planck mass relics as dark matter.

8 pages with 2 figures, comments are very welcome!

References in corpus (15)

• Primordial Black Holes as Dark Matter
• Quantum Nature of the Big Bang
• Primordial Black Holes as Dark Matter: Recent Developments
• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• The 1965 Penrose singularity theorem
• Observational Evidence for Primordial Black Holes: A Positivist Perspective
• Loop Quantum Cosmology: An Overview
• Quantum Oppenheimer-Snyder and Swiss Cheese models
• Planck star phenomenology
• Spacetime Singularities and Cosmic Censorship Conjecture: A Review with Some Thoughts
• Searching for Heavy Dark Matter near the Planck Mass with XENON1T
• Planck Stars from a Scale-dependent Gravity theory
• Could Planck Star Remnants be Dark Matter?
• Primordial black holes as cosmic expansion accelerators
• Static Planck stars from effective loop quantum gravity