非最小耦合暗能量与当前观测约束的匹配
Matching current observational constraints with nonminimally coupled dark energy
AI总结：
本文提出非最小耦合标量场暗能量模型，通过允许稳定的幻影穿越行为，在拟合当前宇宙膨胀速率数据上优于ΛCDM及其他最小耦合模型，但信息论准则显示证据尚不充分。
摘要：
我们证明，具有非最小耦合标量场的宇宙比标准Λ冷暗物质（ΛCDM）模型或其他最小耦合暗能量模型能更好地拟合当前对宇宙膨胀速率的测量。特别是，该模型中的非最小耦合允许暗能量模型表现出稳定的幻影穿越行为，而最新数据对暗能量状态方程的约束似乎暗示了这一行为。虽然我们发现该暗能量模型相对于近期文献中考虑的其他模型在拟合优度上有明显改善，但利用信息论准则，我们表明支持该模型的证据仍不具有决定性。
英文摘要：
We show that a Universe with a nonminimally coupled scalar field can fit current measurements of the expansion rate of the Universe better than the standard $Λ$-Cold Dark Matter ($Λ$CDM) model or other minimally coupled dark energy models. In particular, the nonminimal coupling in this model allows for the dark energy model to exhibit stable phantom crossing behavior, which seems to be suggested by the constraints on the dark energy equation of state coming from the most recent data. While we find a clear improvement in the goodness of fit for this dark energy model with respect to others that have been considered in the recent literature, using information theoretic criteria, we show that the evidence for it is still inconclusive.
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