Quantum theory of gravitation
Abstract
Attempts to obtain a quantum theory of gravitation are reviewed. The essential ideas of those programmes on which extensive work has been done are discussed. Successes and difficulties of each of these programmes are described. The attempts are divided into two broad classes: those based on the techniques of canonical quantization and those based on the techniques of quantum field theory. Our approach is rather geometrical, an approach which facilitates the comparison of various programmes.
 Publication:

Reports on Progress in Physics
 Pub Date:
 October 1974
 DOI:
 10.1088/00344885/37/10/001
 Bibcode:
 1974RPPh...37.1211A
 Keywords:

 Canonical Forms;
 Field Theory (Physics);
 Gravitation Theory;
 Quantum Theory;
 Algebra;
 Boundary Value Problems;
 Constraints;
 Einstein Equations;
 Hamiltonian Functions;
 Operators (Mathematics);
 Perturbation Theory;
 Relativity;
 Wave Functions;
 Astrophysics