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Corrigendum: Quasi-normal modes and fermionic vacuum decay around a Kerr black hole (2019 Class. Quantum Grav. 36 035005) (2019)
Journal Article
Coutant, A., & Millington, P. (2019). Corrigendum: Quasi-normal modes and fermionic vacuum decay around a Kerr black hole (2019 Class. Quantum Grav. 36 035005). Classical and Quantum Gravity, 36(19), 1-2. https://doi.org/10.1088/1361-6382/ab3a23

© 2019 IOP Publishing Ltd Printed in the UK. Due to a mismatch of conventions, some errors arose in the discussion of the electric toy model and the corresponding figure, which we correct herein. We also correct two other minor oversights and provide... Read More about Corrigendum: Quasi-normal modes and fermionic vacuum decay around a Kerr black hole (2019 Class. Quantum Grav. 36 035005).

Quasi-normal modes and fermionic vacuum decay around a Kerr black hole (2019)
Journal Article
Coutant, A., & Millington, P. (2019). Quasi-normal modes and fermionic vacuum decay around a Kerr black hole. Classical and Quantum Gravity, 36(3), Article 035005. https://doi.org/10.1088/1361-6382/aaf679

We analyze the instability of the non-rotating fermion vacuum in Kerr spacetimes. We describe how the co-rotating Fermi sea is formed as a result of a spontaneous vacuum decay. Most significantly, and drawing upon intuition gained from analogous elec... Read More about Quasi-normal modes and fermionic vacuum decay around a Kerr black hole.

Waves on a vortex: rays, rings and resonances (2018)
Journal Article
Torres, T., Coutant, A., Dolan, S., & Weinfurtner, S. (2018). Waves on a vortex: rays, rings and resonances. Journal of Fluid Mechanics, 857, 291-311. https://doi.org/10.1017/jfm.2018.752

We study the scattering of surface water waves with irrotational draining vortices. At small depth, this system is a mathematical analogue of a rotating black hole and can be used to mimic some of its peculiar phenomena. Using ray-tracing methods, we... Read More about Waves on a vortex: rays, rings and resonances.

Black hole quasibound states from a draining bathtub vortex flow (2018)
Journal Article
Patrick, S., Coutant, A., Richartz, M., & Weinfurtner, S. (2018). Black hole quasibound states from a draining bathtub vortex flow. Physical Review Letters, 121(6), Article 061101. https://doi.org/10.1103/physrevlett.121.061101

Quasinormal modes are a set of damped resonances that describe how an excited open system is driven back to equilibrium. In gravitational physics these modes characterize the ringdown of a perturbed black hole, e.g., following a binary black hole mer... Read More about Black hole quasibound states from a draining bathtub vortex flow.

Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model (2018)
Journal Article
Coutant, A., & Weinfurtner, S. (2018). Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model. Physical Review D, 97(2), https://doi.org/10.1103/PhysRevD.97.025006

We analytically study the low-frequency properties of the analogue Hawking effect in Bose-Einstein condensates. We show that in one-dimensional flows displaying an analogue horizon, the Hawking effect is dominant in the low-frequency regime. This hap... Read More about Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model.

Low-frequency analogue Hawking radiation: the Korteweg–de Vries model (2018)
Journal Article
Coutant, A., & Weinfurtner, S. (2018). Low-frequency analogue Hawking radiation: the Korteweg–de Vries model. Physical Review D, 97(2), https://doi.org/10.1103/PhysRevD.97.025005

We derive analytic expressions for the low-frequency properties of the analogue Hawking radiation in a general weak-dispersive medium. A thermal low-frequency part of the spectrum is expected even when dispersive effects become significant. We consid... Read More about Low-frequency analogue Hawking radiation: the Korteweg–de Vries model.

Rotational superradiant scattering in a vortex flow (2017)
Journal Article
Torres, T., Patrick, S., Coutant, A., Richartz, M., Tedford, E. . W., & Weinfurtner, S. (2017). Rotational superradiant scattering in a vortex flow. Nature Physics, 13, https://doi.org/10.1038/nphys4151

When an incident wave scatters off of an obstacle, it is partially reflected and partially transmitted. In theory, if the obstacle is rotating, waves can be amplified in the process, extracting energy from the scatterer. Here we describe in detail th... Read More about Rotational superradiant scattering in a vortex flow.

Detecting rotational superradiance in fluid laboratories (2016)
Journal Article
Cardoso, V., Coutant, A., Richartz, M., & Weinfurtner, S. (2016). Detecting rotational superradiance in fluid laboratories. Physical Review Letters, 117(27), Article 271101. https://doi.org/10.1103/PhysRevLett.117.271101

Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed experimentally. Here, wi... Read More about Detecting rotational superradiance in fluid laboratories.

The imprint of the analogue Hawking effect in subcritical flows (2016)
Journal Article
Coutant, A., & Weinfurtner, S. (2016). The imprint of the analogue Hawking effect in subcritical flows. Physical Review D, 94(6), Article 064026. https://doi.org/10.1103/PhysRevD.94.064026

We study the propagation of low-frequency shallow water waves on a one-dimensional flow of varying depth. When taking into account dispersive effects, the linear propagation of long-wavelength modes on uneven bottoms excites new solutions of the disp... Read More about The imprint of the analogue Hawking effect in subcritical flows.