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arXiv 1302.5564gr-qchep-th
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量子引力的自旋立方体模型

Spin-cube Models of Quantum Gravity

A. Mikovic

摘要:

研究了基于Poincare 2-群表示2-范畴的量子引力的态和模型。我们称它们为自旋立方体模型,因为它们是自旋泡沫模型的分类推广。自旋立方体状态和可以被认为是约束2-BF理论的路径积分,并且取决于如何施加约束,自旋立方体状态和可以被简化为具有边长约束的面积Regge模型的路径积分,或者简化为Regge模型的路径积分。我们还证明了这些自旋立方体模型的有效作用量具有正确的经典极限。

英文摘要:

We study the state-sum models of quantum gravity based on a representation 2-category of the Poincare 2-group. We call them spin-cube models, since they are categorical generalizations of spin-foam models. A spin-cube state sum can be considered as a path integral for a constrained 2-BF theory, and depending on how the constraints are imposed, a spin-cube state sum can be reduced to a path integral for the area-Regge model with the edge-length constraints, or to a path integral for the Regge model. We also show that the effective actions for these spin-cube models have the correct classical limit.

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