Dynamics of quintom and hessence energies in loop quantum cosmology

Hao Wei*, Shuang Nan Zhang

*此作品的通讯作者

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摘要

In the present work, we investigate the universe dominated by quintom or hessence energies in loop quantum cosmology (LQC). Interestingly enough, we find that there are some stable attractors in these two cases. In the case of quintom, all stable attractors have the feature of decelerated expansion. In the case of hessence, most of stable attractors have the feature of decelerated expansion while one stable attractor can have decelerated or accelerated expansion depend on the model parameter. In all cases, the equation-of-state parameter (EoS) of all stable attractors are larger than -1 and there is no singularity in the finite future. These results are different from the dynamics of phantom in LQC, or the ones of phantom, quintom, and hessence in classical Einstein gravity.

源语言英语
文章编号063005
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
76
6
DOI
出版状态已出版 - 12 9月 2007
已对外发布

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Wei, H., & Zhang, S. N. (2007). Dynamics of quintom and hessence energies in loop quantum cosmology. Physical Review D - Particles, Fields, Gravitation and Cosmology, 76(6), 文章 063005. https://doi.org/10.1103/PhysRevD.76.063005