Phenomenology of "dark matter"- from the Everett's quantum cosmology

TL;DR

This paper explores how the Everett's interpretation of quantum mechanics can naturally explain dark matter as matter from alternative realities that influence gravity but are not directly observable through non-gravitational means.

Contribution

It proposes a novel explanation for dark matter based on semiclassical Everett-type gravity, linking quantum cosmology with observable astrophysical phenomena.

Findings

Dark matter effects can arise from matter in alternative Everett worlds.

Semiclassical gravity provides a natural framework for quantum cosmology.

Dark matter may be matter from unperceived alternative realities.

Abstract

It is widely accepted that the Everett's (or "many-worlds") interpretation of quantum mechanics is the only one which is appropriate for quantum cosmology because no environment may exist for Universe as a whole. We discuss, in the framework of the Everett's interpretation, the (quasi-) classical stage of evolution of the Universe when there coexist "classically incompatible" configurations of matter, or classical alternative realities ("alternatives" for short). In the framework of the Everett's interpretation the semiclassical gravity (where the gravitational field is classical and the non-gravitational fields are quantum) is more natural than theories including quantizing gravitational field. It is shown that the semiclassical (at least on the astrophysical and cosmological scales) Everett-type gravity leads to the observational effect known as the effect of dark matter. Instead of assuming special forms of matter (weakly interacting with the known matter), the role of the dark matter is played in this case by the matter of the usual kind which however belongs to those alternative realities (Everett's worlds) which remain {\guillemotleft}invisible{\guillemotright}, i.e. not perceived with the help of non-gravitational fields.