The Hubble tension from the standpoint of quantum cosmology

Abstract

The Hubble tension is analyzed in the framework of quantum cosmological approach. It is found that there arises a new summand in the expression for the total energy density stipulated by the quantum Bohm potential. This additional energy density acts similarly to a stiff matter component, modifying the expansion history of the early universe and decaying with scale factor $a$ as $a^{-6}$, faster than radiation, in late universe. Taking account of this matter-energy component of quantum nature can, in principle, eliminate a discrepancy between the direct late time model-independent measurements of the Hubble constant and its indirect model dependent estimates. The considered model allows one to extend the standard cosmology to quantum sector.

14 pages, 1 figure, v.2: added a new section on numerical estimates, substantially updated the introduction and other sections, significantly expanded the list of references, revised the abstract, v.3: added a new section on stiff matter, expanded the list of references

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Cited by in corpus (1)

• Minisuperspace model of quantum geometrodynamics in the Madelung-Bohm formalism