Talk detail

Participant	Soo, Chopin
Institution	National Cheng Kung University - 1 University Rd. - Tainan - Tainan - Taiwan

Session	AT4	Accepted		Order	Time
Talk	Oral abstract	Title	Resolution of the problem of time in gravitational theory without paradigm of space-time covariance.
Co-authors
Abstract	Covariance of space and time in General Relativity entails a number of technical and conceptual difficulties. These can be resolved by a paradigm shift from full 4-dimensional general coordinate invariance to invariance only with respect to spatial diffeomorphisms. Appositely formulated as a master constraint, the Hamiltonian constraint now determines only dynamics; and is relieved of its dual role of generating symmetry transformations, and the consequent baggage of multi-fingered evolution with arbitrary lapse functions is absent. Classical space-time, with direct correlation of its proper times and intrinsic time intervals, emerges from constructive interference; and the physical content can be regained from a theory with a true Hamiltonian generating intrinsic time translations, but with only spatial diffeomorphism symmetry. Horava-Lifshitz gravity theory is contained as a special case.