Fab 5宇宙学有多神奇？
How Fabulous Is Fab 5 Cosmology?
摘要：
宇宙加速度的扩展引力起源可以解决一些微调问题，并具有有用的特性，但通常对宇宙学常数问题没有什么可说的。Fab 5引力可以是无鬼的和稳定的，在过去和未来都有吸引子解，并具有解决原始宇宙学常数问题的自调谐。然而，我们在这里表明，它并不同时拥有所有这些品质。我们还表明，自调谐是如此强大，它不仅取消了宇宙学常数，但也所有其他能量密度，我们推导出的标度的方法重整化德西特宇宙学。虽然这种强烈的抵消对晚期宇宙是不利的，但它大大缓解了早期宇宙的膨胀。
英文摘要：
Extended gravity origins for cosmic acceleration can solve some fine tuning issues and have useful characteristics, but generally have little to say regarding the cosmological constant problem. Fab 5 gravity can be ghost free and stable, have attractor solutions in the past and future, and possess self tuning that solves the original cosmological constant problem. Here we show however it does not possess all these qualities at the same time. We also demonstrate that the self tuning is so powerful that it not only cancels the cosmological constant but also all other energy density, and we derive the scalings of its approach to a renormalized de Sitter cosmology. While this strong cancellation is bad for the late universe, it greatly eases early universe inflation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
