Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Part I Special Relativity: Minkowski Space-Time
- Part II General Relativity: Globally Hyperbolic Einstein Space-Times
- 5 Hamiltonian Gravity in Einstein Space-Times
- 6 ADM Tetrad Gravity and Its Constraints
- 7 Post-Minkowskian and Post-Newtonian Approximations
- Part III Dirac–Bergmann Theory of Constraints
- Appendix A Canonical Realizations of Lie Algebras, Poincaré Group, Poincar´e Orbits, and Wigner Boosts
- Appendix B Grassmann Variables and Pseudo–Classical Lagrangians
- Appendix C Relativistic Perfect Fluids and Covariant Thermodynamics
- References
- Index
6 - ADM Tetrad Gravity and Its Constraints
from Part II - General Relativity: Globally Hyperbolic Einstein Space-Times
Published online by Cambridge University Press: 17 June 2019
- Frontmatter
- Dedication
- Contents
- Preface
- Part I Special Relativity: Minkowski Space-Time
- Part II General Relativity: Globally Hyperbolic Einstein Space-Times
- 5 Hamiltonian Gravity in Einstein Space-Times
- 6 ADM Tetrad Gravity and Its Constraints
- 7 Post-Minkowskian and Post-Newtonian Approximations
- Part III Dirac–Bergmann Theory of Constraints
- Appendix A Canonical Realizations of Lie Algebras, Poincaré Group, Poincar´e Orbits, and Wigner Boosts
- Appendix B Grassmann Variables and Pseudo–Classical Lagrangians
- Appendix C Relativistic Perfect Fluids and Covariant Thermodynamics
- References
- Index
Summary
In the chosen family of Einstein space-times one can give an ADM formulation of tetrad gravity and of its first-class constraints, so that fermions can be described in this framework. There are 16 configuration variables, 16 momenta, and 14 first-class constraints. Then one can define a new canonical basis adapted to 10 of the 14 constraints (not to the super-Hamiltonian and super-momentum ones) with a Shanmugadhasan canonical transformation. This allows identifying two pairs of canonical variables describing the tidal effects (the gravitational waves after linearization). However, they are not Dirac observables.
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- Non-Inertial Frames and Dirac Observables in Relativity , pp. 138 - 166Publisher: Cambridge University PressPrint publication year: 2019