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arXiv 0901.0025hep-th
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秩为2的李代数的电S-膜解:G的加速和小变差

Electric S-brane solutions corresponding to rank-2 Lie algebras: acceleration and small variation of G

V. D. Ivashchuk, S. A. Kononogov, V. N. Melnikov

摘要:

考虑了具有两个非复合电膜和一组l个标量场的电S膜解。膜的交规则对应于李代数A_2、C_2和G_2。解包含五个因子空间。其中之一,M_0,被解释为我们的三维空间。结果表明,存在一个时间间隔,在这个时间间隔内,三维空间的加速膨胀与有效引力常量G(τ)的足够小的变化是相容的。该区间包含函数G(τ)的极小点τ_0。本文分析了一个具有两个幻影标量场的特解,证明了在点τ_0附近,线性近似下计算的G(τ)的时间变化按李代数A_2,C_2,G_2的顺序减小。

英文摘要:

Electric S-brane solutions with two non-composite electric branes and a set of l scalar fields are considered. The intersection rules for branes correspond to Lie algebras A_2, C_2 and G_2. The solutions contain five factor spaces. One of them, M_0, is interpreted as our 3-dimensional space. It is shown that there exists a time interval where accelerated expansion of our 3-dimensional space is compatible with a small enough variation of the effective gravitational constant G(τ). This interval contains τ_0, a point of minimum of the function G(τ). A special solution with two phantom scalar fields is analyzed and it is shown that in the vicinity of the point τ_0 the time variation of G(τ) (calculated in the linear approximation) decreases in the sequence of Lie algebras A_2, C_2 and G_2.

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。

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