Discrete Gravity Models and Loop Quantum Gravity: a Short Review

Dupuis, Maite; Ryan, James P.; Speziale, Simone

doi:10.3842/SIGMA.2012.052

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Discrete Gravity Models and Loop Quantum Gravity: a Short Review

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Ryan, James P.
Canonical and Covariant Dynamics of Quantum Gravity, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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1204.5394
(プレプリント), 690KB

sigma12-052.pdf
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引用

Dupuis, M., Ryan, J. P., & Speziale, S. (2012). Discrete Gravity Models and Loop Quantum Gravity: a Short Review. Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 8:. doi:10.3842/SIGMA.2012.052.

引用: https://hdl.handle.net/11858/00-001M-0000-000E-EB18-4

要旨

We review the relation between Loop Quantum Gravity on a fixed graph and discrete models of gravity. We compare Regge and twisted geometries, and discuss discrete actions based on twisted geometries and on the discretization of the Plebanski action. We discuss the role of discrete geometries in the spin foam formalism, with particular attention to the definition of the simplicity constraints.