arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.3902hep-thhep-ph
收藏

不稳定规范通量紧化的命运

The Fate of Unstable Gauge Flux Compactifications

C. P. Burgess, S. L. Parameswaran, I. Zavala

摘要:

通量被广泛用于稳定额外维度,但如果它们出现在非阿贝尔规范扇区内,它们通常是不稳定的。我们寻求这种不稳定性的命运,专注于最简单的例子:六维中的球面-球面紧化。在没有引力的情况下,大多数非阿贝尔单极子是不稳定的,在同一拓扑类中衰减成唯一稳定的单极子。我们证明了在Einstein-YM系统中也是如此,相应地调整了几何结构:由不稳定的π支撑的Mink(d)xS 2几何结构松弛为AdS(d)xS 2。对于6D超引力,介子阻碍了这种简单的演化,获得了梯度,从而打破了一些时空对称性。我们认为,这是4D对称性,打破,并检查几个端点候选人。将超引力系统氧化成一个更高维的爱因斯坦-YM介子,我们用后者来引导我们到达相应的终点。其结果是一个奇异的Kasner型几何,共形于Mink(4)xS 2。该解具有较低的势能和微扰稳定性,使其成为演化的合理候选端点。(arXiv的摘要)

英文摘要:

Fluxes are widely used to stabilise extra dimensions, but if they arise within a non-abelian gauge sector they are often unstable. We seek the fate of this instability, focussing on the simplest examples: sphere-monopole compactifications in six dimensions. Without gravity most non-abelian monopoles are unstable, decaying into the unique stable monopole in the same topological class. We show that the same is true in Einstein-YM systems, with the geometry adjusting accordingly: a Mink(d)xS2 geometry supported by an unstable monopole relaxes to an AdS(d)xS2. For 6D supergravity, the dilaton obstructs this simple evolution, acquiring a gradient and thus breaking some of the spacetime symmetries. We argue that it is the 4D symmetries that break, and examine several endpoint candidates. Oxidising the supergravity system into a higher-dimensional Einstein-YM monopole, we use the latter to guide us to the corresponding endpoint. The result is a singular Kasner-like geometry conformal to Mink(4)xS2. The solution has lower potential energy and is perturbatively stable, making it a sensible candidate endpoint for the evolution. (Abridged abstract for arXiv.)

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。

↑