Dark matter droplets

TL;DR

This paper proposes a novel dark matter model based on Bose Einstein condensate droplets, which influences early universe structure formation and cosmological measurements, potentially explaining high-redshift anomalies and low Hubble constant values.

Contribution

It introduces a new dark matter model with Bose Einstein condensate droplets that impacts early universe dynamics and cosmological parameter measurements.

Findings

Rapid structure formation shortly after the big bang

Modifications to the expansion rate before droplet formation

Potential explanation for high-redshift structure anomalies and low Hubble constant

Abstract

A new model for dark matter is put forward which consists of uniform droplets of Bose Einstein condensate. In this model, structure forms rapidly, shortly after the hot big bang plasma de-ionises. The model also produces modifications to the expansion rate before droplet formation that affect the measurement of cosmological parameters from Cosmic Microwave Background data. The model could contribute to explaining why observations at high redshift see anomalously high structure formation and predict low values for the Hubble constant.