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Automorphisms in loop quantum gravity
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DOI：10.1088/0264-9381/26/23/235022.png)
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摘要
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We investigate a certain distributional extension of the group of spatial diffeomorphisms in loop quantum gravity. This extension, which is given by the automorphisms Aut(P) of the path groupoid P, was proposed by Velhinho and is inspired by category theory. These automorphisms have much larger orbits than piecewise analytic diffeomorphisms. In particular, we will show that graphs with the same combinatorics but different generalized knotting classes can be mapped into each other. We describe the automorphism-invariant Hilbert space and comment on how a combinatorial formulation of LQG might arise.
Keyword:
HIGHER GAUGE-THEORY
SPIN NETWORKS
HILBERT-SPACE
AQG
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IF:
3.7
论文数:
1.3W
被引数:
3.0W
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