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arXiv 1204.0965gr-qchep-th
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渐近安全情景下量子引力诱导的物质自相互作用

Quantum-gravity-induced matter self-interactions in the asymptotic-safety scenario

Astrid Eichhorn

摘要:

我们研究了与量子引力耦合的物质理论的高能性质。具体来说,我们表明,量子引力波动一般诱导物质的自相互作用的标量理论。我们的计算适用于渐近安全的量子引力,我们的结果表明,紫外线是由一个相互作用的固定点,与非零的引力以及物质耦合。特别是,动量相关的标量自相互作用是非零的,并诱导一个非零的动量无关的标量势。此外,我们指出,这种类型的条款可以在标量场驱动的通货膨胀的背景下,在那里他们可以诱导潜在的可观察到的非高斯性的CMB的可观察的后果。

英文摘要:

We investigate the high-energy properties of matter theories coupled to quantum gravity. Specifically, we show that quantum gravity fluctuations generically induce matter self-interactions in a scalar theory. Our calculations apply within asymptotically safe quantum gravity, where our results indicate that the UV is dominated by an interacting fixed point, with non-vanishing gravitational as well as matter couplings. In particular, momentum-dependent scalar self-interactions are non-zero and induce a non-vanishing momentum-independent scalar potential. Furthermore we point out that terms of this type can have observable consequences in the context of scalar-field driven inflation, where they can induce potentially observable non-Gaussianities in the CMB.

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