Work

A quantum state for the late Universe

Year: 2022

Type: article

Abstract: We consider the quantum description of a toy model universe in which the Schwarzschild-de Sitter geometry emerges from the coherent state of a massless scalar field. Although highly idealised, this simple model allows us to find clear hints supporting the conclusion that the reaction of the de Sitter background to the presence of matter sources induces i) a modified Newtonian dynamics at galactic scales and ii) different values measured for the present Hubble parameter. Both effects stem from the conditions required to have a normalisable quantum state.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2022.136900

Authors: Andrea Giusti, Silvia Buffa, Lavinia Heisenberg, Roberto Casadio

Institutions: ETH Zurich, Institute for Theoretical Physics, University of Bologna, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond