耦合标量场-暗物质模型中绝热不稳定性的无害性
The innocuousness of adiabatic instabilities in coupled scalar field-dark matter models
摘要：
非最小耦合标量场模型在线性微扰水平上存在不稳定的增长模。这些不稳定性的性质取决于标量场的动力学状态。特别是在系统中，承认绝热解决方案，大规模的不稳定性被抑制的慢滚动力学领域。在这里，我们回顾了这些结果，并提出了初步的可能性数据分析表明，沿绝热解耦合模型的引力强度的顺序耦合可以提供可行的宇宙学场景，满足从超新星Ia，CMB和大尺度结构数据的约束。
英文摘要：
Non-minimally coupled scalar field models suffer of unstable growing modes at the linear perturbation level. The nature of these instabilities depends on the dynamical state of the scalar field. In particular in systems which admit adiabatic solutions, large scale instabilities are suppressed by the slow-roll dynamics of the field. Here we review these results and present a preliminary likelihood data analysis suggesting that along adiabatic solutions coupled models with coupling of order of gravitational strength can provide viable cosmological scenarios satisfying constraints from SN Ia, CMB and large scale structure data.
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