Gravity and gauge theory seem spectacularly different, yet their physical predictions reveal a remarkable structural relationship known as the double copy. I will discuss how this connection has evolved from a tool for calculating quantum scattering amplitudes into an organizing principle for gravitational effective field theories, with recent applications ranging from precision gravitational-wave physics to a novel window into puzzling aspects of black holes emit radiation and decay. I will close with some open questions about how far this might go, taking recent lessons from black hole studies to collective and cosmological spacetime.
John Joseph Carrasco, Associate Professor, Northwestern University
Host: Andre de Gouvea
Joan West
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