宇宙加速：视界和平坦性问题的自然补救
Cosmic Acceleration: A Natural Remedy For Horizon and Flatness Problems
摘要：
标准大爆炸宇宙学在解释真实宇宙的许多观测方面取得了巨大成功。然而，它所面临的两个特殊困难是所谓的“水平”和“平坦性”问题。通过假设最近发现的宇宙加速是一个真正的和永远存在的效果，我们表明，由此产生的修改弗里德曼模型是免费的上述两个问题，没有必要调用额外的“通货膨胀”的初始阶段作为一个单独的成分。标准big babg宇宙学（它预言宇宙减速）的重要宇宙学里程碑，如GUT对称性破缺时期或辐射物质退耦时期，在修正宇宙学中可能在红移值方面或多或少保持不变。然而，就宇宙时间$t$而言，在这种情况下，当宇宙变得更老时，所有这些纪元都发生得更早。
英文摘要：
The standard big bang cosmology has been greatly successful in explaining many observational aspects of the real universe. However, two particular diffficulties faced by it are the so-called ``horizon'' and ``flatness'' problems. By assuming that the recently found cosmic acceleration to be a genuine and ever present effect, we show that, the resultant modified Friedman model is free from both the above referred problems, and there is no need to invoke the additional ``inflationary'' initial phase as a seperate ingredient. The important cosmological milestones of the standard big babg cosmology (which predicts cosmic deceleration) like GUT symmetry breaking epoch or radiation matter decoupling epoch may remain more or less unchanged in the modified cosmology in terms of redshift values. However, in terms of cosmic time $t$, all such epochs occur earlier as the universe becomes older in this case.
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