发表机构
University of California, Irvine（加州大学尔湾分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究暗物质与暗能量耦合模型中的宇宙学停滞，证明停滞条件与参数空间排除，并应用于暗维度场景。
AI 中文摘要
我们在耦合暗物质和暗能量模型中研究宇宙学停滞，其中标量场驱动暗能量并设定暗物质质量，以暗维度作为启发性实现。将暗物质、暗能量、重子和辐射视为自治动力系统，我们证明精确停滞要求轨迹沿指数斜率，而运行斜率根据运行是否可积给出精确停滞或漂移的准停滞。恒定丰度解是耦合精质的平稳解，我们将其解读为具有可计算寿命和出口的停滞时期。将宇宙学锚定到物质-辐射等量和今天的测量丰度，我们证明停滞区域在任何初始条件下都不能加速，并且总状态方程永远不会是幻影，尽管$\Lambda$CDM拟合的有效暗能量可能看起来如此。对于暗维度，一旦施加暗第五力约束，势的几何源在未来捕获到停滞被排除，而标准模型膜上的暗物质产生支持进一步停滞，标准情景无法达到。停滞解提供了不依赖于初始条件的参数空间解析排除。
英文摘要
We study cosmological stasis in coupled dark matter and dark energy models in which a scalar field drives the dark energy and sets the dark matter mass, with the Dark Dimension as the motivating realization. Treating dark matter, dark energy, baryons, and radiation as an autonomous dynamical system, we show that exact stasis requires exponential slopes along the trajectory, and that running slopes give exact stasis or a drifting quasi-stasis depending on whether the running is integrable. The constant abundance solutions are the stationary solutions of coupled quintessence, which we read as stasis epochs with computable lifetimes and exits. Anchoring the cosmology to the measured abundances at matter-radiation equality and today, we show that the stasis region for this model cannot accelerate for any initial conditions, and that the total equation of state is never phantom although the effective dark energy of a $Λ$CDM fit can appear so. For the Dark Dimension, capture into stasis in the future is excluded for geometric sources of the potential once dark fifth-force bounds are imposed, and dark matter production from the Standard Model brane supports a further stasis which the standard scenario does not reach. The stasis solutions provide analytic exclusions of the parameter space which do not depend on initial conditions.
Commentsv1: 35 pages, 9 figures, 2 tables, comments welcome! v2: additional citations, minor edits to phrasings
