弯曲时空中体积标度因子的演化
Evolution of Bulk Scale Factor in Warped Space-time
摘要：
在这项工作中，额外的维度在加速宇宙中的作用，通过更高维的Friedmann-Robertson-Walker（FRW）宇宙学的方案进行了研究。为此，我们首先考虑标准平坦膜情形下的弯曲时空作为5维时空中Robertson-Walker（RW）度规的修正形式，然后得到了体尺度因子（弯曲因子）相对于类空和类时额外维的变化。最后，它表明，这两种类型的额外的维度是重要的，在这种情况下，也体尺度因子起着两个不同的作用。
英文摘要：
In this work the role of extra dimensions in the accelerated universe through the scenario of higher-dimensional Friedmann-Robertson-Walker (FRW) cosmology has been studied. For this purpose, we first consider warped space-time in the standard flat brane scenario as the modified form of Robertson-Walker (RW) metric in five-dimension (5D) space-time and then the variation of the bulk scale factor (warp factor), with respect to both space-like and time-like extra dimensions is obtained. Finally, it is shown that both of two types of extra dimensions are important in this scenario and also the bulk scale factor plays two different roles.
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