Speaker
Robin Oberfrank
(Perimeter Institute)
Description
Can short-distance quantum fluctuations leave an imprint at large distances? This question is especially important in gravity, where high-energy physics may influence low-energy observables. In this talk, I will discuss this question using the time delay of light rays in interferometer setups as a concrete observable. I will present the gauge-invariant definition of the time-delay noise and show what this observable tells us about quantum fluctuations of the gravitational field, including both graviton fluctuations and the gravitational response to quantum stress-energy fluctuations.
Authors
Dr
Laurent Freidel
Robin Oberfrank
(Perimeter Institute)