Science, Space and Technology News 2024
Researchers applied quantum field theory to the early universe, predicting fewer primordial black holes than other models suggest, potentially impacting the dark matter theory. Credit: SciTechDaily.com
Researchers have applied the well-understood and highly verified quantum field theory, usually applied to the study of the very small, to a new target, the early universe. Their exploration led to the conclusion that there ought to be far fewer miniature black holes than most models suggest, though observations to confirm this should soon be possible.
Humble beginnings. The study finds how large amplitude fluctuations generated on small scales can amplify large-scale fluctuations observed in the cosmic microwave background. Credit: © 2024 ESA/Planck Collaboration, modified by Jason Kristiano CC-BY-ND“We call them primordial black holes , and many researchers feel they are a strong candidate for dark matter, but there would need to be plenty of them to satisfy that theory,” said graduate student Jason Kristiano.
In this case, the team used a novel approach to correct the leading model of PBH formation from cosmic inflation so it better aligns with current observations and could be further verified with upcoming observations by terrestrial gravitational wave observatories around the world.. Cosmic inflation rapidly expanded that by 25 orders of magnitude. At that time, waves traveling through this tiny space could have had relatively large amplitudes but very short wavelengths.
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