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arXiv 0905.2348astro-ph.COgr-qchep-th
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非最小精粹和具有接近平坦电位的体模

Non-minimal quintessence and phantom with nearly flat potentials

Gaveshna Gupta, Emmanuel N. Saridakis, Anjan A. Sen

摘要:

我们调查的精髓和幻影暗能量的情况下,其中的标量场演变在近平坦的潜力和非最低限度地耦合到重力。我们表明,所有这样的模型收敛到一个共同的行为,我们提供了相应的近似解析表达式为$w(Ω_ϕ)$和$w(a)$。我们发现,非最小耦合导致更丰富的宇宙学行为相比,它的最小对应。此外,与重子声学振荡和最新的超新星数据的比较表明,可以更容易地建立一致性,并对模型参数的严格限制。

英文摘要:

We investigate quintessence and phantom dark energy scenarios, in which the scalar fields evolve in nearly flat potentials and are non-minimally coupled to gravity. We show that all such models converge to a common behavior and we provide the corresponding approximate analytical expressions for $w(Ω_ϕ)$ and $w(a)$. We find that non-minimal coupling leads to richer cosmological behavior comparing to its minimal counterpart. In addition, comparison with Baryon Acoustic Oscillation and latest Supernovae data reveals that agreement can be established more easily and with less strict constraints on the model parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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