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Hamiltonian dynamics of higher-order theories of gravity

Journal Article · · J. Math. Phys. (N.Y.); (United States)
DOI:https://doi.org/10.1063/1.527797· OSTI ID:6681814

The Hamiltonian dynamics of gravitational theories with general Lagrangians quadratic in components of the curvature tensor is investigated. It is shown that the Noether generator corresponding to the action of the diffeomorphism group of space-time naturally defines the energy-momentum function E. The analysis of the differential of E gives rise to a formula for the symplectic two-form ..cap omega.. and thereby defines symplectic (canonical) variables of the system. This construction is four-covariant, that is, independent of a chosen slicing of space-time. A more thorough analysis is performed in the (3+1) decomposition. In this scheme the canonical classification of quadratic Lagrangians is presented. It singles out the class of canonically regular Lagrangians as well as four classes of degenerate ones. The Cauchy--Kowalewska problem for all these classes is formulated.

Research Organization:
Department of Physics, Yale University, 217 Prospect Street, New Haven, Connecticut 06511
OSTI ID:
6681814
Journal Information:
J. Math. Phys. (N.Y.); (United States), Journal Name: J. Math. Phys. (N.Y.); (United States) Vol. 28:1; ISSN JMAPA
Country of Publication:
United States
Language:
English