Prof. Dr. Gustav Mogull

The by-now routine detection of gravitational waves by LIGO, Virgo and KAGRA has driven interest in better approaches for modelling the gravitational two-body problem. There is a broad ongoing effort to apply techniques used for calculating scattering amplitudes in quantum field theories (QFTs) to obtaining gravitational observables. Unlike more conventional post-Newtonian (PN) approaches, which assume slow-moving bodies, amplitudes-based methods give results in the post-Minkowskian (PM) expansion, which assumes only weak fields. The two are therefore a complement to each other.

Having worked on QFT-based scattering amplitudes for several years, I am now applying my experience to this highly active field. The Worldline Quantum Field Theory (WQFT) formalism, which I developed, is specifically designed for performing QFT-based scattering calculations designed to target classical gravitational observables. I am using it to produce scattering observables including spin, radiation and tidal effects. These can be incorporated into effective-one-body (EOB) waveform models, and will ultimately be used to achieve improved waveform modelling.

Publications
Here are links to my publications: from Spires, and from the ADS database.