论文标题
扩展的亚稳黑能
Extended Metastable Dark Energy
论文作者
论文摘要
通过假设当前的假真空能量密度是原始膨胀阶段的残留物，可以重新审视亚稳态的暗能量方案。此处描述了零温度标量场电位，该电源均通过一个均匀的第六级订单来描述，该订单取决于3个自由参数：标量场（$ M $）的质量（$ m $），指定标准自我交互项的无量纲（$λ$），以及量化所有可能的偏离量化的自由级别质量比例（$ m $）。当前的$λ$ CDM模型是虚假真空的漫长衰减时间的结果，尽管有限远大于宇宙的当前年龄。该结果对于$ m/m $比率的任意组合仍然有效，该比率可以在薄壁近似中分析确定，并在此限制之外进行数值计算。与文献中的许多主张不同，真空优势可能是暂时的。衰减时间的有限性表明，在这种情况下，观察到的宇宙的最终阶段不会由De Sitter型宇宙学驱动。
The metastable dark energy scenario is revisited by assuming that the current false vacuum energy density is the remnant from a primeval inflationary stage. The zero temperature scalar field potential is here described by an even power series up to order six which depends on 3 free parameters: the mass of the scalar field ($m$), the dimensionless ($λ$) specifying the standard self-interaction term, and a free cutoff mass scale ($M$) quantifying all possible deviations from the degenerate false vacuum state. The current $Λ$CDM model is a consequence of the very long decay time of the false vacuum which although finite is much greater than the current age of the Universe. This result remains valid for arbitrary combinations of the $m/M$ ratio which can analytically be determined in the thin-wall approximation and numerically calculated outside this limit. Unlike many claims in the literature the vacuum dominance may be temporary. The finiteness of the decay time suggests that the ultimate stage of the observed Universe in such a scenario will not be driven by a de Sitter type cosmology.
