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arXiv 0707.0680hep-th
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一级结构与畴壁/膜宇宙学对应

First-order framework and domain-wall/brane-cosmology correspondence

D. Bazeia, F. A. Brito, F. G. Costa

摘要:

我们解决了从膜宇宙学的宇宙学解中找到畴壁解的可能性。我们发现一阶方程相应的宇宙学/域壁的解决方案上诱导3膜。二次项的能量密度在诱导弗里德曼方程中起着非标准的作用,我们讨论了如何恢复标准的宇宙和畴壁模型的膜张力变大,并显示它们可以描述为四维超引力作用在这样的限制。最后,我们表明,3-膜上的重力是局部的,因为一个移动远离生活在膜上的二维域壁。

英文摘要:

We address the possibility of finding domain wall solutions from cosmological solutions in brane cosmology. We find first-order equations for corresponding cosmology/domain wall solutions induced on 3-branes. The quadratic term of energy density in the induced Friedmann equation plays a non-standard role and we discuss the way the standard cosmological and domain wall models are recovered as the brane tension becomes large and show how they can be described by four-dimensional supergravity action in such a limit. Finally, we show that gravity on the 3-brane is locally localized as one moves away from the two-dimensional domain walls living on the brane.

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