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21 papers · 2 filters
Photon propagator in de Sitter space in the general covariant gauge
Dražen Glavan, Tomislav Prokopec
We consider a free photon field in -dimensional de Sitter space, and construct its propagator in the general covariant gauge. Canonical quantization is employed to define the sy…
Self-Interacting Gravitational Atoms in the Strong-Gravity Regime
Horng Sheng Chia, Christoffel Doorman, Alexandra Wernersson +2
We numerically investigate free and self-interacting ultralight scalar fields around black holes in General Relativity. We focus on complex scalar fields whose self-interaction…
Normalizing flows as an avenue to study overlapping gravitational wave signals
Jurriaan Langendorff, Alex Kolmus, Justin Janquart +1
Due to its speed after training, machine learning is often envisaged as a solution to a manifold of the issues faced in gravitational-wave astronomy. Demonstrations have been given…
Combining effective-one-body accuracy and reduced-order-quadrature speed for binary neutron star merger parameter estimation with machine learning
Jacopo Tissino, Gregorio Carullo, Matteo Breschi +3
We present mlgw-bns, a gravitational waveform surrogate that allows for a significant improvement in the generation speed of frequency-domain waveforms for binary neutron star merg…
Parameter estimation methods for analyzing overlapping gravitational wave signals in the third-generation detector era
Justin Janquart, Tomasz Baka, Anuradha Samajdar +2
In the coming years, third-generation detectors such as Einstein Telescope and Cosmic Explorer will enter the network of ground-based gravitational-wave detectors. Their current de…
Unraveling information about supranuclear-dense matter from the complete binary neutron star coalescence process using future gravitational-wave detector networks
Anna Puecher, Tim Dietrich, Ka Wa Tsang +4
Gravitational waves provide us with an extraordinary tool to study the matter inside neutron stars. In particular, the postmerger signal probes an extreme temperature and density r…