alexa Abstract | Unitary Representations of the Translational Group Acting as Local Diffeomorphisms of Space-Time
ISSN: 2090-0902

Journal of Physical Mathematics
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We continue to develop further a new mathematical approach to the quantisation of general field theories such as general relativity and modified gravity. Treating quantum fields as fibre bundles, we discuss operators acting on each fibre that generate a ‘Fibre Algebra’. The algebras of two types of operators are considered in detail, namely observables as generic physical variables and more specialised quantum operators suitable for describing particles, symmetries and transformations. We then introduce quantum states of these operators and examine their properties. By establishing a link between the commutativity and group cohomology of the translational group as a local gauge group, we show that this leads to unitary representations. of the local gauge group of diffeomorphisms under very general topological conditions; as well the construction of generalised symmetric quantum states invariant under this group action. Discussion of these results in the context of loop quantum gravity and other current theories highlights constraints on the local nature of space-time.

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Author(s): Moffat J*, Oniga T and Wang CHT


Algebra, Lie algebra, Quantisation, Fibre bundle, Unitary Representations of the Translational Group Acting as Local Diffeomorphisms of Space-Time

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