Research in Physics

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I am interested in the approximate analytical description of binary compact objects in general relativity and an application to gravitational wave astronomy. More specifically, I am interested in the inclusion of the multipoles of the compact objects, such as spin or quadrupole, into the post-Newtonian, post-Minkowskian, and small mass ratio approximations. The spin effects were completed recently to the fourth post-Newtonian order using an effective field theory approach. For the quadrupole case my investigations include dynamical tides, which become important when the orbital motion is in resonance with an oscillation mode of the (general relativistic) compact object. This is of particular interest for neutron stars and I was granted a DFG research fellowship for this project in the past. More recently I am also working on the Effective One Body model for gravitational waveforms from compact binaries at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in the group for Astrophysical and Cosmological Relativity. In this Effective One Body model, the results of the mentioned approximations are incorporated synergetically, together with information from full-fledged numerical simulations. This makes it one of the most powerful tools to predict gravitational waveforms for gravitational wave astronomy.

Publications

List of publictions from Summary: 3 Phys. Rev. Letters, one being a Research Highlight in Nature, and an Editor’s Suggestion in PRD

Theses

PhD thesis: Canonical Formulation of Spin in General Relativity, published in Ann. Phys. (Berlin) 523 (2011) 919-924
Diploma thesis (in German): Supersymmetric Lattice Field Theories

Talks

List of talks

Summary: 18 invited talks, including the international MG14 conference, the international GR20 and GR21 conferences, the 524. WE-Heraeus-Seminar, a main talk on the 2010 German Physical Society (DPG) meeting, and one as a candidate for the Thesis Price 2012 of the DPG.

"James B. Hartle Award" for a talk on the GR19 conference

Outreach contributions

Talk on neutron stars and black holes in computers, Potsdam Science Day 2017
Interview for Development Company for Television Program (dctp) on the work of PRL 116 (2016) 181101
Interviews on the first gravitational wave detection by LIGO for: Antenne Brandenburg, Babelsberg Hitradio, Radio Frei, Reuters (TV)
Welt der Physik: Die Suche nach Gravitationswellen
Deutschlandfunk: Delle auf Reisen - Die Fahndung nach den Gravitationswellen
Deutschlandfunk: Neutronensterne - Mehr als ausgebrannte Sternleichen

Lectures

Jürgen Ehlers Spring School 2017, three lectures on gravitational waves
Lectures on gravitational waves at the Humboldt University Berlin
geo-Q lecture week no 2 2016, two lectures on electrodynamics and special relativity
IMPRS lecture week no 2 2016, two lectures on generation of gravitational waves and spherical stars
IMPRS lecture week and geo-Q lecture week no 1 2016, five lectures on relativity
IMPRS lecture week no 1 2015, three lectures on relativity
One lecture on representations of semidirect products (in German)

Various

Korteweg–de Vries Equation and Supersymmetric Quantum Mechanics (in German), source code: soli.tar.bz2
Experimental physics (in German): Protokolle zum F-Praktikum