Lattice spinor gravity

Details Lattice spinor gravity Lattice spinor gravity

2011-08-05

arxiv.org/abs/1108.1313v2

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, minor corrections

Scientific paper

We propose a regularized lattice model for quantum gravity purely formulated in terms of fermions. The lattice action exhibits local Lorentz symmetry, and the continuum limit is invariant under general coordinate transformations. The metric arises as a composite field. Our lattice model involves no signature for space and time, describing simultaneously a Minkowski or euclidean theory. It is invariant both under Lorentz transformations and euclidean rotations. The difference between space and time arises from expectation values of composite fields. Our formulation includes local gauge symmetries beyond the generalized Lorentz symmetry. The lattice construction can be employed for formulating models with local gauge symmetries purely in terms of fermions

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