Some aspects of primary black holes in the early Universe and inflationary cosmology

  • Alexander E. Shalyt-Margolin Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus

Abstract

Primary black holes can arise in the early Universe irrespective of what cosmological scenario of its expansion (inflationary, cyclic or other) is realised. However, the very existence of these objects can change the basic parameters of the above scenario if they arise before the beginning of its realisation, i. e. in first moments after the Big Bang. Therefore, the investigation of the formation and evaporation of primary black holes is a powerful tool to study the processes in the early Universe, in particular, the gravitational collapse, various cosmological models, and also high energy physics. At present these black holes are studied most often within the semiclassical approximation, i. e. in the case when the secondary quantised fields of matter are considered against the classical space-time background. But since energies at which primary black holes arise often are close to Planckian energies, such consideration cannot be considered satisfactory, since in this case quantum-gravitational effects become essential. This paper demonstrates the ways to include the quantum-gravitational corrections generated by this effects in inflationary cosmological models if primary black holes arise in the preinflationary epoch. It is shown that, due to the validity of the generalised uncrtainty principle, these corrections may be calculated for all the fundamental inflationary parameters, specifically, for the scale factor, Hubble parameter, slow roll parameters, etc.

Author Biography

Alexander E. Shalyt-Margolin, Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220006, Belarus

doctor of science (physics and mathematics); chief researcher at the laboratory of fundamental interactions

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Published
2023-05-29
Keywords: primary black holes, inflationary cosmology, quantum-gravitational corrections
Supporting Agencies The author would like to thank the reviewer for his important comments on the text of the article.
How to Cite
Shalyt-Margolin, A. E. (2023). Some aspects of primary black holes in the early Universe and inflationary cosmology. Journal of the Belarusian State University. Physics, 2, 74-81. Retrieved from https://journals.bsu.by/index.php/physics/article/view/5605
Issue
No 2 (2023): Journal of the Belarusian State University. Physics
Section
Theoretical Physics

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