July 18, 2024
Quantum Limits of Knowledge 2021 Tuesday 30th March, 2021 We argue that in canonical quantum gravity there is no fundamental Born rule at the level of the Wheeler-DeWitt equation, and that an effective Born rule emerges only in the Schrödinger approximation for quantum systems on a classical spacetime background. Furthermore, we show that small quantum-gravitational corrections to the Schrödinger equation can render the Born rule unstable. These results are shown to arise naturally in the de Broglie-Bohm pilot-wave formulation of canonical quantum gravity.