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arXiv 0907.5510hep-thgr-qc
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关于量子引力的半经典态与非对易几何

On Semi-Classical States of Quantum Gravity and Noncommutative Geometry

Johannes Aastrup, Jesper M. Grimstrup, Mario Paschke, Ryszard Nest

摘要:

我们构造了可归一化的,半经典状态的量子引力,这是制定为一个完整的循环谱三重模型。谱三元组的半经典极限给出了3+1维的狄拉克哈密顿量。此外,与时间无关的流逝和移位场从半经典态中出现。我们的分析表明,该模型可能包含费米子物质的自由度。本文提出的半经典分析消除了初始半有限谱三元组构造中的大多数模糊性。立方晶格起着坐标系的作用,在狄拉克型算子中发现的自由参数的发散序列被确定为一定的逆无穷小体积元。

英文摘要:

We construct normalizable, semi-classical states for the previously proposed model of quantum gravity which is formulated as a spectral triple over holonomy loops. The semi-classical limit of the spectral triple gives the Dirac Hamiltonian in 3+1 dimensions. Also, time-independent lapse and shift fields emerge from the semi-classical states. Our analysis shows that the model might contain fermionic matter degrees of freedom. The semi-classical analysis presented in this paper does away with most of the ambiguities found in the initial semi-finite spectral triple construction. The cubic lattices play the role of a coordinate system and a divergent sequence of free parameters found in the Dirac type operator is identified as a certain inverse infinitesimal volume element.

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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