Probing cosmic expansion through small anisotropies in a Bose-Einstein condensate analogue
General Relativity and Quantum Cosmology
2025-05-01 v1
Abstract
In this letter, it is shown that by measuring quantities like density variance in the present state of an analogue universe one can assess information about its history due to the mere existence of small anisotropies in earlier times, here modeled by non-uniform densities. This offers a valuable tool to probe and compare cosmic expansion models and, as an application, it is shown that quantum fluctuations can have a significant impact on the observable universe depending on its history.
Keywords
Cite
@article{arxiv.2504.21236,
title = {Probing cosmic expansion through small anisotropies in a Bose-Einstein condensate analogue},
author = {Miguel Citeli de Freitas and Thaïs Nivaille and Caio C. Holanda Ribeiro},
journal= {arXiv preprint arXiv:2504.21236},
year = {2025}
}