论文标题
改性重力理论中非单明性反弹的各个方面
Aspects of non-singular bounce in modified gravity theories
论文作者
论文摘要
弹跳宇宙的场景是达到奇异性宇宙学模型的最活跃的研究领域之一。已经提出了不同的建议，以避免通过重力的量子方面避免所谓的“大爆炸”奇异性，而重力尚未有适当的理解。相反，在这项工作中，我们考虑了三种不同的方法，每种方法都超出了一般相对论，但仍在经典的宇宙学场景领域范围内解决这个问题。所有这些方法的标志是，在模型的几何框架中，弹跳机制的起源在某种程度上是自然的，而无需手头掺入外部源。在这些情况下，我们还讨论了这些可行的宇宙学模型需要满足的各种约束。
Scenario of a bouncing universe is one of the most active area of research to arrive at singularity free cosmological models. Different proposals have been suggested to avoid the so called 'big bang' singularity through the quantum aspect of gravity which is yet to have a proper understanding. In this work, on the contrary, we consider three different approaches, each of which goes beyond General Relativity but remain within the domain of classical cosmological scenario, to address this problem. The hallmark of all these approaches is that the origin of the bouncing mechanism is somewhat natural within the geometrical framework of the model without any need of incorporating external source by hand. In the context of these scenarios ,we also discuss various constraints that these viable cosmological models need to satisfy.
