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arXiv 0812.2214gr-qc
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圈量子引力的分形结构

Fractal Structure of Loop Quantum Gravity

Leonardo Modesto

摘要:

本文利用不同尺度下的面积谱计算了圈量子引力(LQG)的谱维数。当探测标量场的能量由高到低时,空间截面的谱维数在1.5位相上从2维到3维。我们还利用自旋泡沫模型的结果计算了时空的谱维数,得到了一个二维高能有效流形。我们的结果与非微扰量子引力的另外两种方法:因果动力学三角剖分和渐近安全量子引力是一致的。

英文摘要:

In this paper we have calculated the spectral dimension of loop quantum gravity (LQG) using simple arguments coming from the area spectrum at different length scales. We have obtained that the spectral dimension of the spatial section runs from 2 to 3, across a 1.5 phase, when the energy of a probe scalar field decrees from high to low energy. We have calculated the spectral dimension of the space-time also using results from spin-foam models, obtaining a 2-dimensional effective manifold at hight energy. Our result is consistent with other two approach to non perturbative quantum gravity: causal dynamical triangulation and asymptotic safety quantum gravity.

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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