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arXiv 1401.6441gr-qchep-thmath-phmath.MP
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圈量子引力的新真空

A new vacuum for Loop Quantum Gravity

Bianca Dittrich, Marc Geiller

摘要:

我们构造了一个新的圈量子引力真空,它与Ashtekar-Lewandowski真空是对偶的.因为它是基于BF理论,这个新的真空是物理的$(2+1)$维引力,更接近自旋泡沫量子化的精神。为了构造这个新的真空和量子观测量的相关表示,我们引入了一个修改的完整性通量代数,它与[1]中提出的时间演化加细的概念是柱坐标一致的。这支持了在[1,2]中提出的建立物理真空的建议,也支持了$(3+1)$维引力的建议。我们期望这里引入的真空将有助于从圈量子引力中提取大尺度物理和宇宙学预言。

英文摘要:

We construct a new vacuum for loop quantum gravity, which is dual to the Ashtekar-Lewandowski vacuum. Because it is based on BF theory, this new vacuum is physical for $(2+1)$-dimensional gravity, and much closer to the spirit of spin foam quantization in general. To construct this new vacuum and the associated representation of quantum observables, we introduce a modified holonomy-flux algebra which is cylindrically consistent with respect to the notion of refinement by time evolution suggested in [1]. This supports the proposal for a construction of a physical vacuum made in [1,2], also for $(3+1)$-dimensional gravity. We expect that the vacuum introduced here will facilitate the extraction of large scale physics and cosmological predictions from loop quantum gravity.

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