Gas of thin tubes of massless scalar field as a possible model of unified dark fluid

Abstract

In this work, we investigated the influence of constants that characterize the motion of thin tubes of a massless scalar field (TToMSF) in a gas on the global properties of such a gas, in particular, on its ability to accelerated expansion. The peculiarity of the TToMSF gas is related to the fact that the parameter of its equation of state $w$ depends on the degree of rarefaction of the gas and can take values in a very wide range of values $-1<w<1$. In this case, fluctuations in the density of the TToMSF gas, caused by its gravitational interaction with non-uniformly distributed baryonic matter, should lead to the implementation of local equations of state with different values and different laws of change of the parameter $w$. The possibility of implementing local equations of state can alleviate the tensions associated with the observed non-uniformity of the distribution of matter and the growth of structures in the Universe.

32 pages, 9 figures

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