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arXiv 0802.1783hep-thgr-qc
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关于量子引力中的谱三元组I

On Spectral Triples in Quantum Gravity I

Johannes Aastrup, Jesper M. Grimstrup, Ryszard Nest

摘要:

本文建立了非对易几何与正则量子引力之间的联系。给出了连通空间上的半有限谱三元组。该三元组涉及一个完整循环的代数和一个类似于全局函数导算子的狄拉克型算子。狄拉克算符和代数之间的相互作用再现了广义相对论的泊松结构。此外,相关联的希尔伯特空间对应,直到离散对称群,从圈量子引力已知的非同态不变态的希尔伯特空间。相应地,狄拉克算符的平方在正则量子引力中具有整体面积平方算符的形式。此外,光谱作用量类似于量子引力的配分函数。该结构是背景独立的,是基于一个归纳系统的三角剖分。本文是关于这一主题的两篇论文中的第一篇。

英文摘要:

This paper establishes a link between Noncommutative Geometry and canonical quantum gravity. A semi-finite spectral triple over a space of connections is presented. The triple involves an algebra of holonomy loops and a Dirac type operator which resembles a global functional derivation operator. The interaction between the Dirac operator and the algebra reproduces the Poisson structure of General Relativity. Moreover, the associated Hilbert space corresponds, up to a discrete symmetry group, to the Hilbert space of diffeomorphism invariant states known from Loop Quantum Gravity. Correspondingly, the square of the Dirac operator has, in terms of canonical quantum gravity, the form of a global area-squared operator. Furthermore, the spectral action resembles a partition function of Quantum Gravity. The construction is background independent and is based on an inductive system of triangulations. This paper is the first of two papers on the subject.

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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