33 citations · 110 across the 5 of their papers we have counts for
5 papers
General Covariance and the "Problem of Time" in a Discrete Cosmology
Graham Brightwell, H. Fay Dowker, Joe Henson +2
Identifying an appropriate set of ``observables'' is a nontrivial task for most approaches to quantum gravity. We describe how it may be accomplished in the context of a recently p…
Many accelerating black holes
H. F. Dowker, S. N. Thambyahpillai
We show how the Weyl formalism allows metrics to be written down which correspond to arbitrary numbers of collinear accelerating neutral black holes in 3+1 dimensions. The black ho…
Spin and statistics in quantum gravity
H. F. Dowker, R. D. Sorkin
We present a review of the spin and statistics of topological geons, particles in 3+1 quantum gravity. They can have half-odd-integral spin and fermionic statistics and since the u…
Morse index and causal continuity. A criterion for topology change in quantum gravity
H. F. Dowker, R. S. Garcia, S. Surya
Studies in 1+1 dimensions suggest that causally discontinuous topology changing spacetimes are suppressed in quantum gravity. Borde and Sorkin have conjectured that causal disconti…
A Spin-Statistics Theorem for Certain Topological Geons
H. F. Dowker, R. D. Sorkin
We review the mechanism in quantum gravity whereby topological geons, particles made from non-trivial spatial topology, are endowed with nontrivial spin and statistics. In a theory…