In this paper, we analyze the universe evolution and phase space behavior of the Umami Chaplygin model, where the Umami Chaplygin fluid replaces both a dark energy and a dark and baryonic matter. We find the Umami Chaplygin model can be stable against perturbations under some conditions and can be used to explain the late-time cosmic acceleration. The results of phase space analysis show that there exists a late-time accelerated expansion attractor with wuc = −1, which indicates the Umami Chaplygin fluid can behave as a cosmological constant. Moreover, the Umami Chaplygin model can describe the expansion history of the universe. The evolutionary trajectories of the statefinder diagnostic pairs and the finite time future singularities are also discussed.

中文翻译：

---

Umami Chaplygin 模型的相空间分析

在本文中，我们分析了 Umami Chaplygin 模型的宇宙演化和相空间行为，其中 Umami Chaplygin 流体取代了暗能量和暗重子物质。我们发现 Umami Chaplygin 模型在某些条件下可以对扰动保持稳定，并且可以用来解释后期宇宙加速。相空间分析结果表明，存在一个后期加速膨胀吸引子w你C = -1，这表明 Umami Chaplygin 流体可以表现为宇宙学常数。此外，Umami Chaplygin 模型可以描述宇宙的膨胀历史。还讨论了状态查找器诊断对的演化轨迹和有限时间的未来奇点。