| Speaker: | Hoi-lai Yu (Academia Sinica) |
|---|---|
| Title: | General Relativity without paradigm of space-time covariance, and resolution of the problem of time |
| Date (JST): | Thu, Nov 29, 2012, 10:30 - 11:30 |
| Place: | Seminar Room B |
| Related File: | 833.pdf |
| Abstract: | The framework of a theory of gravity from quantum to classical regimes is presented. Paradigm shift from full space-time covariance to spatial diffeomorphism invariance, together with clean decomposition of the canonical structure, yield transparent physical dynamics and a resolution of the problem of time. The deep divide between quantum mechanics and conventional canonical formulations of quantum gravity is overcome with a Schrodinger equation for quantum geometrodynamics which describes evolution in intrinsic time. Unitary time development with gauge-invariant temporal ordering is also viable. All Kuchar observables become physical; and classical space-time, with direct correlation between its proper times and intrinsic time intervals, emerges from constructive interference. The framework not only yields a physical Hamiltonian for Einstein's theory, but also prompts natural extensions and improvements towards a well-behaved quantum theory of gravity. |
