The dynamic evolutions of the generalized Hobbit model and structure formation |
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Authors: | Ya Bo Wu Ming Hui Fu Fang Yuan Cheng and Huan Huan Fu |
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Institution: | (1) Department of Physics, Liaoning Normal University, 116029 Dalian, People’s Republic of China;(2) Department of Mathematics and Physics, Shenyang Command College, 110113 Shenyang, People’s Republic of China |
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Abstract: | In this paper a more general phenomenological model is proposed on the basis of the Hobbit model in Cardone et al. (Phys Rev
D 69:083517, 2004). The main purpose of constructing our model is to make this model can not only mimic the ΛCDM model, but
also describe a four-phase smooth transition of the universe, namely the inflationary phase, a radiation-dominated phase,
a matter-dominated phase and a de Sitter-like phase. In order to check whether this model is a viable one, the evolutions
of the universe are respectively discussed in the two cases, and the possible physical interpretations for this model are
also respectively shown by using the scalar fields. Finally, the structure formations in our model are simply discussed for
the both cases, and the results given by us reconfirm that our model can be regarded as a fit to the ΛCDM model, if we choose
the proper conditions. |
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Keywords: | Dark matter Dark energy Structure formation |
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