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- Andrew Toon
- 1993

General covariance in quantum gravity is seen once one integrates over all possible metrics. In recent years topological field theories have given us a different route to general covariance without integrating over all possible metrics. Here we argue that Einstein quantum gravity may be viewed of as a topological field theory as long as a certain constraint… (More)

- Andrew Toon
- 1992

By demanding that the path integral measure of topological field theories be metric independent, we can derive powerful constraints on the particle content of a topological field theory as well as on the dimensionality of space-time. Ref: OUTP-92-30P Supported by the Royal Society, England. 1

- Andrew Toon
- ACM Comm. Computer Algebra
- 2015

- Andrew Toon
- 1993

The partition function of 2+1 Chern-Simons Witten topological gravity has an attractive physical interpretation in terms of the unbroken and broken phases of gravity. We make this physical interpretation manifest by using the background field method. Supported by the Royal Society England.

- Andrew Toon
- 1996

It is argued that quantum gravity has an interpretation as a topological quantum field theory provided a certain constraint from the path integral measure is respected. The constraint forces us to couple gauge and matter fields to gravity for space time dimensions different from 3. We then discuss possible models which may be relevant to our universe.… (More)

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