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arXiv 1811.03005gr-qc
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2-具有正则和非正则动力学项的暗能量场模型

2-field model of dark energy with canonical and non-canonical kinetic terms

O. Sergijenko

摘要:

我们推广quintom包括快子动力学项与经典之一。对于这样的模型,我们得到了能量密度和压强的表达式。对于四维空间的Friedmann-Robertson-Walker度规,我们导出了空间平坦、均匀、各向同性的宇宙场的运动方程。本文详细讨论了标量场势$U(ϕ,ξ)$的重建问题。这样的重建不能明确地完成,所以我们考虑$U(ϕ,ξ)$的3种最简单的形式:$Φ(ϕ)$和$Ξ(ξ)$的乘积,$Φ(ϕ)$和$Ξ(ξ)$的和以及该和的$κ$次幂。

英文摘要:

We generalize quintom to include the tachyonic kinetic term along with the classical one. For such a model we obtain the expressions for energy density and pressure. For the spatially flat, homogeneous and isotropic Universe with Friedmann-Robertson-Walker metric of 4-space we derive the equations of motion for the fields. We discuss in detail the reconstruction of the scalar fields potential $U(ϕ,ξ)$. Such a reconstruction cannot be done unambiguously, so we consider 3 simplest forms of $U(ϕ,ξ)$: the product of $Φ(ϕ)$ and $Ξ(ξ)$, the sum of $Φ(ϕ)$ and $Ξ(ξ)$ and this sum to the $κ$th power.

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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