# Cosmic acceleration from quantum Friedmann equations

## TL;DR

This paper derives quantum-modified Friedmann equations in a simplified universe model, showing quantum effects can cause accelerated expansion similar to dark energy without a cosmological constant.

## Contribution

It introduces a quantum gravity-inspired modification to Friedmann equations using a mini-superspace approach, explaining cosmic acceleration without dark energy.

## Key findings

- Quantum effects induce accelerated expansion in the model.
- Certain wave functions lead to acceleration consistent with observations.
- No need for a cosmological constant to explain acceleration.

## Abstract

We consider a simplified model of quantum gravity using a mini-superspace description of an isotropic and homogeneous universe with dust. We derive the corresponding Friedmann equations for the scale factor, which now contain a dependence on the wave function. We identify wave functions for which the quantum effects lead to a period of accelerated expansion that is in agreement with the apparent evolution of our universe, without introducing a cosmological constant.