1210.5619 (Vasudev Shyam et al.)

Presymplectic Geometry And The Problem Of Time. Part 2    [PDF]

Vasudev Shyam, B. S. Ramachandra

The Problem of Time in Quantum Gravity is analyzed from a classical presymplectic perspective. In the first part of the paper the Three Space Approach to General Relativity is introduced via the Barbour-- Foster --\'O Murchadha action and the dynamics corresponding to a theory of relativistic gravity where spacetime is not an a priori requirement. We also look into the nature and physical interpretation of the constraints in this theory and compare them with those of Standard ADM General Relativity. We then study the presymplectic phase space of three space general relativity and discuss briefly the notion of observables and perennials of the system. Also, we re-derive the ephemeris-lapse identification of the BF\'O theory.

View original: http://arxiv.org/abs/1210.5619