Large-scale structure in superfluid Chaplygin gas cosmology

Understand

We investigate the growth of large-scale structure in the superfluid Chaplygin gas (SCG) model.

• Both linear and non-linear growth, such as $\sigma_8$ and the skewness $S_3$, are discussed.
• We find the growth factor of SCG reduces to the EdS case at early times while differs from the $\Lambda$CDM case in the large $a$ limit.
• We also find there will be much stricture growth on large scales in the SCG scenario than in $\Lambda$CDM and the variations of $\sigma_{8}$ and $S_3$ between SCG and $\Lambda$CDM can not be discriminated.