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arXiv 1205.6166gr-qchep-thmath-phmath.MP
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圈量子引力的广义通量空间

On the space of generalized fluxes for loop quantum gravity

Bianca Dittrich, Carlos Guedes, Daniele Oriti

摘要:

我们证明了由于规范群SU(2)的非阿贝尔性,不能通过对广义联络空间--位置空间--的射影极限结构进行傅立叶变换来构造圈量子引力的广义通量空间--动量空间.从SU(2),U(1)^[3]的阿贝尔化中,我们得知广义通量空间是一个归纳极限,并且我们确定了在粗粒化的基础图下通量应满足的相容性条件。我们评论的应用,以圈量子宇宙学,特别是如何的玻尔紧化的真正的线作为一个投影极限的特征开辟了道路,类似的分析LQC。

英文摘要:

We show that the space of generalized fluxes - momentum space - for loop quantum gravity cannot be constructed by Fourier transforming the projective limit construction of the space of generalized connections - position space - due to the non-abelianess of the gauge group SU(2). From the abelianization of SU(2), U(1)^3, we learn that the space of generalized fluxes turns out to be an inductive limit, and we determine the consistency conditions the fluxes should satisfy under coarse-graining of the underlying graphs. We comment on the applications to loop quantum cosmology, in particular, how the characterization of the Bohr compactification of the real line as a projective limit opens the way for a similar analysis for LQC.

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