Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-08-31
Phys.Rev. D61 (2000) 084007
Physics
High Energy Physics
High Energy Physics - Theory
The Lorentzian boundary conditions have been extended to a much more general class, more details given of quantization in the
Scientific paper
10.1103/PhysRevD.61.084007
We show that there is a sector of quantum general relativity which may be expressed in a completely holographic formulation in terms of states and operators defined on a finite boundary. The space of boundary states is built out of the conformal blocks of SU(2)_L + SU(2)_R, WZW field theory on the n-punctured sphere, where n is related to the area of the boundary. The Bekenstein bound is explicitly satisfied. These results are based on a new lagrangian and hamiltonian formulation of general relativity based on a constrained Sp(4) topological field theory. The hamiltonian formalism is polynomial, and also left-right symmetric. The quantization uses balanced SU(2)_L + SU(2)_R spin networks and so justifies the state sum model of Barrett and Crane. By extending the formalism to Osp(4/N) a holographic formulation of extended supergravity is obtained, as will be described in detail in a subsequent paper.
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