arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.2192hep-th
收藏

膜快子动力学

Brane tachyon dynamics

Hongsheng Zhang, Xin-Zhou Li, Hyerim Noh

摘要:

本文研究了附着在Dvali,Gabadadze和Porrati(DGP)膜上的快子的动力学行为.分别探讨了指数势和逆幂律势。在指数势和逆幂律势两种情况下都发现了准吸引子行为,宇宙最终将进入类似于慢卷膨胀的阶段。单个标量的虚暗能量的状态方程(EOS)可以跨越两个势的分支$θ=-1$中的幻影分界,而单个标量的虚暗能量的状态方程不能跨越分支$θ=1$中的幻影分界.

英文摘要:

The dynamics of a tachyon attached to a Dvali, Gabadadze and Porrati (DGP) brane is investigated. Exponential potential and inverse power law potential are explored, respectively. The quasi-attractor behavior, for which the universe will eventually go into a phase similar to the slow-roll inflation, is discovered in both cases of exponential potential and inverse power law potential. The equation of state (EOS) of the virtual dark energy for a single scalar can cross the phantom divide in the branch $θ=-1$ for both potentials, while the EOS of the virtual dark energy for a single scalar can not cross this divide in the branch $θ=1$.

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。

↑