It was recently shown that velocity-dependent forces between parallel fundamental strings moving apart in a $D-$dimensional spacetime implied an accelerating expanding universe in $D-1$-dimensional space-time. Exact solutions were obtained for the early time expansion in $D=5,6$. Here we show that this result also holds for fundamental strings in the background of a fivebrane, and argue that the feature of an accelerating universe would hold for more general $p$-brane-seeded models.
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机译：最近的研究表明，平行的基本弦之间在$ D- $维时空中移动的速度相关力意味着在$ D-1 $维时空中宇宙的加速膨胀。对于$ D = 5,6 $，可以得到用于早期扩展的精确解。在这里，我们证明了这一结果在五br的背景下也适用于基本弦，并认为加速宇宙的特征将适用于更普遍的$ p $ ane播种子模型。
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