科研之友
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摘要
We investigate the tachyonic cosmological potential V(I center dot) 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 lead 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.
- 出版日期2012-8
