arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1009.0874hep-thgr-qchep-ph
收藏

关于弦论中的爬标量

On Climbing Scalars in String Theory

E. Dudas, N. Kitazawa, A. Sagnotti

摘要:

在弦模型与“膜超对称性破缺”指数电位出现在(闭弦)树的水平,但不伴随着快子。这种类型的势长期以来一直是平坦空间中令人尴尬的原因,但对宇宙学可能有有趣的影响。例如,在10维中,对数斜率|V '/V|精确地位于一个“临界”值,当标量场从大爆炸中出现时,当它从\emph{forced}爬上势能时,卢钦-马塔雷斯吸引子消失。这种类型的行为原则上在弦耦合中是微扰的,在紧化后仍然存在,可能是宇宙演化的结果,将标量场困在势阱中,也可能是我们宇宙的暴胀相。

英文摘要:

In string models with "brane supersymmetry breaking" exponential potentials emerge at (closed-string) tree level but are not accompanied by tachyons. Potentials of this type have long been a source of embarrassment in flat space, but can have interesting implications for Cosmology. For instance, in ten dimensions the logarithmic slope |V'/V| lies precisely at a "critical" value where the Lucchin--Matarrese attractor disappears while the scalar field is \emph{forced} to climb up the potential when it emerges from the Big Bang. This type of behavior is in principle perturbative in the string coupling, persists after compactification, could have trapped scalar fields inside potential wells as a result of the cosmological evolution and could have also injected the inflationary phase of our Universe.

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。

↑