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arXiv 1205.0733gr-qc
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协变LQG中的离散对称性

Discrete Symmetries in Covariant LQG

Carlo Rovelli, Edward Wilson-Ewing

摘要:

我们研究了在物理流形上和协变圈引力中的时间反演和宇称。我们考虑一个小的修改的霍尔斯特行动,使它在这种变换下的连贯性。经典理论不受影响,但量子理论略有不同。特别是,简单性约束略有修改,这限制了自旋泡沫中的取向翻转只发生在简并区域,从而减少了潜在的分歧的来源。

英文摘要:

We study time-reversal and parity ---on the physical manifold and in internal space--- in covariant loop gravity. We consider a minor modification of the Holst action which makes it transform coherently under such transformations. The classical theory is not affected but the quantum theory is slightly different. In particular, the simplicity constraints are slightly modified and this restricts orientation flips in a spinfoam to occur only across degenerate regions, thus reducing the sources of potential divergences.

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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