Bonn 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Bonn musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

GR: Fachverband Gravitation und Relativitätstheorie

GR 13: Numerical Relativity

GR 13.2: Vortrag

Donnerstag, 2. April 2020, 15:30–15:45, H-HS V

Application of numerical relativity to the prediction of thermal noise in interferometric gravitational wave detectors — •Tom Wlodarczyk, Nils Fischer, and Harald Pfeiffer — Albert-Einstein-Institut Potsdam

One factor limiting the sensitivity of interferometric ground-based gravitational wave (GW) detectors such as Advanced LIGO and Virgo is thermal noise originating in the coatings of the mirrors which form the interferometer. An improved understanding of the properties of this thermal noise may lead to a reduction of this noise-source, with an attendant improvement in the GW detector's sensitivity. The fluctuation-dissipation theorem relates thermal noise properties to elastic deformations of the mirrors when certain external forces are applied. The resulting partial differential equations are similar to those that arise in solutions of the Einstein constraint equations for merging black holes, and therefore opens the possibility to utilise modern numerical relativity codes to improve the design of future GW detectors. This talk reports on the status of this project. Our goal is to make statements about thermal noise with regard to the geometry and structure of the mirror coatings and potential beam shapes.