A tachyonic scalar field with mutually interacting components

Details A tachyonic scalar field with mutually interacting components A tachyonic scalar field with mutually interacting components

2011-12-09

arxiv.org/abs/1112.2559v1

Physics

General Physics

14 pages

Scientific paper

We investigate the tachyonic cosmological potential $V(\phi)$ in two different cases of the quasi-exponential expansion of universe and discuss various forms of interaction between the two components---matter and the cosmological constant--- of the tachyonic scalar field, which leads to the viable solutions of their respective energy densities. The distinction among the interaction forms is shown to appear in the $O_{m}(x)$ diagnostic. Further, the role of the high- and low-redshift observations of the Hubble parameter is discussed to determine the proportionality constants and hence the correct form of matter--cosmological constant interaction.

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