Recovering the spacetime metric from a holographic theory of gravity
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For almost twenty years there has been growing evidence for a “gauge/gravity” duality, in which a theory of gravity is equivalent to a nongravitational gauge theory. This duality is “holographic” since one can view the gauge theory as living on the boundary of space at infinity. I will first review this duality and some of the evidence for it. Then I will describe a new way to recover the spacetime metric from the dual gauge theory. This new approach is based on a special class of spacelike crosssections of the boundary called lightcone cuts.
This talk is part of the Theoretical Physics Colloquium series.
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