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10 years of SPRG and GW observations

The 10th anniversary of the Portuguese Society of Relativity and Gravitation (SPRG), along with the anniversary of the first gravitational wave (GW) detection, was celebrated with a specially made cake at the XVIII Black Holes Workshop.

How much can gravitons be squeezed?

GGD - Gr@V Seminar
Speaker
Panagiotis Dorlis (National Technical University of Athens (NTUA))
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event type

Dyson, just before the first detection of Gravitational Waves (GWs) by LIGO, raised the question of whether the detection of a single graviton can be achieved with GW strain detectors. If this is possible, then it would be a direct evidence for the quantization of the gravitational field.

Quasi-integrability in classical field theories

GGD - Gr@V Seminar
Speaker
Paulo E. G. Assis (Universidade Federal de Catalão)
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event type

We present a general inverse scattering formalism for systems with quasi-zero curvature representations, extending the tools of integrable models to the quasi-integrable setting.

Quantum fermion superradiance in charged black holes

GGD - Gr@V Seminar
Speaker
Álvaro Álvarez-Domínguez (Universidad Complutense de Madrid & IPARCOS)
Event date
Venue
Hybrid: room 11.2.23 and Zoom
Event type
In contrast to a classical charged bosonic field, a classical charged fermionic field does not exhibit superradiant scattering when placed in the background of a static charged black hole. However, we show that a quantum version of this effect does occur.

Kobra: a Vlasov Code with AMR

GGD - Gr@V seminar
Speaker
Sebastian Konewko (Gent University)
Event date
Venue
Hybrid: Sala Sousa Pinto and Zoom
Event type

Plasmas in fusion reactors are highly prone to instabilities. Edge-localized modes (ELMs) occurring at the scrape-off layer (SOL) are instabilities that are responsible for large energy losses in the plasma core and present large potential for damage to the plasma-facing components.