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Gravity as a diffeomorphism invariant SU(2) gauge theory

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I will describe how geometry and its dynamics can be described using an SU(2) gauge field instead of the metric. This works in 4 spacetime dimensions and is based on the self-duality. The advantage of this new gauge-theoretic formalism is that the (linearised) description of gravitons is much simpler than in the metric language. This simplicity relies on a certain complex of differential operators. I will also touch on the computation of the gravitational one-loop effective action in this language.

This talk is part of the Quantum Fields and Strings Seminars series.

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