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SYDK: Joint Symposium of the Danish and German Physical Societies

SYDK 1: Joint Symposium of the Danish and German Physical Societies

SYDK 1.2: Invited Talk

Monday, September 8, 2025, 11:25–12:05, ZHG008

General Relativity from Quantum Theory — •Niels Emil J. Bjerrum-Bohr — Niels Bohr Institute, Copenhagen

Gravity is an elemental theory of physics, but its exact quantum mechanical nature remains a mystery. A significant breakthrough is that we can now directly measure the effects of massive black holes colliding in the Universe through gravitational waves. This exciting development has opened up possibilities for intriguing comparisons between measurements of gravitational interactions and theoretical expectations. In this talk, I will describe how to derive results for observables in classical gravity using quantum field theory by applying the Bohr correspondence principle. This approach provides new insights into the fundamental nature of gravitational interactions and could potentially reveal deviations from Einstein's theory of general relativity.

Keywords: Quantum Field Theory; General Relativity; Correspondence Principle; Black holes; Gravitational Waves