Hyperbolic Cardassian universe

ZHANG Xu-Ning

doi:10.1088/1674-1137/38/7/075102

Chinese Physics C> 2014, Vol. 38> Issue(7) : 075102 DOI: 10.1088/1674-1137/38/7/075102

Hyperbolic Cardassian universe

ZHANG Xu-Ning ^,

Hezhou University, Hezhou 542800, China

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We propose a hyperbolic function form of the Cardassian component in the Cardassian model. Using the repartition of this Cardassian component, we can obtain a non-zero gravitational interaction between the time derivative of Ricci scalar curvature and the baryon/lepton number current in the radiation-dominated universe. Furthermore, the other term that acts like a non-zero cosmological constant would give an accelerated expansion of current universe and the features of this model do not violate our desired requirements.

References

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ZHANG Xu-Ning. Hyperbolic Cardassian universe[J]. Chinese Physics C, 2014, 38(7): 075102. doi: 10.1088/1674-1137/38/7/075102

ZHANG Xu-Ning. Hyperbolic Cardassian universe[J]. Chinese Physics C, 2014, 38(7): 075102. doi: 10.1088/1674-1137/38/7/075102 shu

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Received: 2013-09-02
Revised: 2013-12-12

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Hyperbolic Cardassian universe

Corresponding author: ZHANG Xu-Ning,

Hezhou University, Hezhou 542800, China

Received Date: 2013-09-02

Accepted Date: 2013-12-12

Available Online: 2014-07-05

Abstract: We propose a hyperbolic function form of the Cardassian component in the Cardassian model. Using the repartition of this Cardassian component, we can obtain a non-zero gravitational interaction between the time derivative of Ricci scalar curvature and the baryon/lepton number current in the radiation-dominated universe. Furthermore, the other term that acts like a non-zero cosmological constant would give an accelerated expansion of current universe and the features of this model do not violate our desired requirements.

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通讯作者: 陈斌, bchen63@163.com

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