标题： 与时间依赖动量交换相互作用的暗能量预测 显示英文标题

标题： Forecasts for interacting dark energy with time-dependent momentum exchange

摘要： 相互作用暗能量和暗物质模型为解决宇宙学矛盾提供了一种可能的解决方案。 在本工作中，我们研究了一个具有时间依赖耦合强度$\xi(z)$的纯动量交换模型，该模型可能有助于缓解$S_8$矛盾。 我们进行费舍尔预测和马尔可夫链蒙特卡洛分析，以约束不同红移区间的耦合强度$0.0<z<2.1$，使用未来类似DESI调查的规格。 对于此分析，我们检查了一个具有常数方程状态$w=-0.9$的模型，以及一个具有演化$w(z)$的解冻暗能量模型。 我们表明，对于常数方程状态，$\xi(z)$可以在所有红移区间内得到良好约束。 然而，由于早期时间效应较弱，在解冻$w(z)$模型的情况下，高红移处的约束显著减少。 显示英文摘要

摘要： Models of interacting dark energy and dark matter offer a possible solution to cosmological tensions. In this work, we examine a pure momentum-exchange model with a time-dependent coupling strength $\xi(z)$ that could help to alleviate the $S_8$ tension. We perform Fisher forecasting and MCMC analysis to constrain the coupling strength of this interaction for different redshift bins $0.0<z<2.1$, using the specifications of upcoming DESI-like surveys. For this analysis, we examine both a model with a constant equation of state $w=-0.9$, as well as a thawing dark energy model with an evolving $w(z)$. We show that, for a constant equation of state, $\xi(z)$ can be well constrained in all redshift bins. However, due to a weaker effect at early times, the constraints are significantly reduced at high redshifts in the case of a thawing $w(z)$ model.