论文标题
各向异性爱因斯坦阳米尔斯希格斯黑暗能源
Anisotropic Einstein Yang-Mills Higgs Dark Energy
论文作者
论文摘要
在黑暗能源场景的背景下,Rinaldi M. Rinaldi(参见JCAP 1510,023(2015))在SO(3)表示中的爱因斯坦Yang-Mills Higgs模型中,以同质和异型式时空进行了研究。我们重新审视了这个模型,特别是发现希格斯字段与量规场之间的相互作用对动量密度,各向异性应力和压力产生贡献,从而使模型与假定的背景不一致。相反,我们考虑了本文中的同质但各向异性的Bianchi-I时空背景,并分析了系统的相应动力学行为。我们发现,唯一的吸引子点对应于由希格斯电位主导的各向同性加速膨胀。但是,该模型预测如今的不可忽略的各向异性剪切贡献,即当前的宇宙可以将其放松,尽管它将在将来放松。我们研究了暗能量方程的演变,并突出了其行为与大规模结构形成过程有关的一些可能后果。作为补充,我们提出“希格斯三合会”,以使爱因斯坦杨米尔斯希格斯模型与同质和各向同性时空保持一致。
In the context of the dark energy scenario, the Einstein Yang-Mills Higgs model in the SO(3) representation was studied for the first time by M. Rinaldi (see JCAP 1510, 023 (2015)) in a homogeneous and isotropic spacetime. We revisit this model, finding in particular that the interaction between the Higgs field and the gauge fields generates contributions to the momentum density, anisotropic stress and pressures, thus making the model inconsistent with the assumed background. We instead consider a homogeneous but anisotropic Bianchi-I space-time background in this paper and analyze the corresponding dynamical behaviour of the system. We find that the only attractor point corresponds to an isotropic accelerated expansion dominated by the Higgs potential. However, the model predicts non-negligible anisotropic shear contributions nowadays, i.e. the current Universe can have hair although it will loose it in the future. We investigate the evolution of the equation of state for dark energy and highlight some possible consequences of its behaviour related to the process of large-scale structure formation. As a supplement, we propose the "Higgs triad" as a possibility to make the Einstein Yang-Mills Higgs model be consistent with a homogeneous and isotropic spacetime.