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GR: Fachverband Gravitation und Relativitätstheorie

GR 5: Gravitational Waves

GR 5.7: Vortrag

Dienstag, 22. März 2022, 18:15–18:35, GR-H2

General Relativity from Worldline Quantum Field Theory — •Gustav Uhre Jakobsen — Humboldt-Universität zu Berlin, Berlin, Germany — Max-Planck-Institut für Gravitationsphysik, Potsdam, Germany

The worldline quantum field theory (WQFT) has recently been developed in order to describe classical gravitational interactions. While the goal is to analyse bound dynamics of binaries and their gravitational waves, this framework most naturally describes scattering (unbound) events. This in line with other quantum field theoretic approaches. However, several insights from this field has shown that the two regimes of unbound vs bound motion are intrinsically related.

I will present our current supersymmetric WQFT which describes spinning black holes or stars. Here, the supersymmetry encodes the symmetries of the spin degrees of freedom. I will consider several of the scattering observables that we have derived from this WQFT and how they can be related to bound ones. Examples are the eikonal, the spin kick and the total deflection.

Finally, I will consider future perspectives and challenges of the WQFT. This includes extending the WQFT in order to describe new phenomenological aspects of e.g. neutron stars and improving the integration techniques in order to increase precision of observables.