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arXiv 1107.1071hep-thgr-qc
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广义相对论中四元组场的正则非对易代数

Canonical Noncommutativity Algebra for the Tetrad Field in General Relativity

Martin Kober

摘要:

本文考虑了四分量场非对易分量假设下的广义相对论。由于表示引力场的四元组场的代数性质被假定为对应于非对易几何规范情形下坐标的非对易性代数,因此这一思想与非对易几何以及引力的规范量子化密切相关。根据这一假设,导出了广义相对论的广义场方程,它是用作用量内的四分量场算符代替通常的四分量场,然后建立相干态间相应场方程的期望值而得到的。这些相干态指的是从四元组场算符的分量产生的产生和湮灭算符。在这个意义上,所得到的理论可以被看作是引力的完全量子描述的一种半经典近似。考虑的前提是张量的一个特殊的选择,确定代数提供了一个划分的时空成两个二维平面。

英文摘要:

General relativity under the assumption of noncommuting components of the tetrad field is considered in this paper. Since the algebraic properties of the tetrad field representing the gravitational field are assumed to correspond to the noncommutativity algebra of the coordinates in the canonical case of noncommutative geometry, this idea is closely related to noncommutative geometry as well as to canonical quantization of gravity. According to this presupposition generalized field equations for general relativity are derived which are obtained by replacing the usual tetrad field by the tetrad field operator within the actions and then building expectation values of the corresponding field equations between coherent states. These coherent states refer to creation and annihilation operators created from the components of the tetrad field operator. In this sense the obtained theory could be regarded as a kind of semiclassical approximation of a complete quantum description of gravity. The consideration presupposes a special choice of the tensor determining the algebra providing a division of space-time into two two-dimensional planes.

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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