An effective view on quantum gravity! | with John Donoghue
A common issue that arise when attempting to quantize gravity is the incompatibilty between quantum field theory and general relativity. However, they work fine at ordinary energy scales. This suggests a separation between low- and high-energy descriptions, the latter requiring a full-fledged quantum theory of gravity. However, at low-energy scales a description in terms of effective field theory may just be enough. In this way, we can distinguish low-energy effects and obtain some insights for the high-energy regime. In this video, John Donoghue explains how effective field theory can indeed help us to obtain an efficient understanding of quantum gravity.
John F. Donoghue is an American theoretical physicist. He works on several topics in high-energy physics, such as particle physics, astrophysics, and cosmology. He dedicated much effort to a description of quantum gravitational physics in terms of an effective field theory. Presently, he is an Emeritus Professors at the University of Massachusetts, USA.