Seminari

Scattering of gravity waves in subcritical flows over an obstacle, theoretical and experimental progresses

Name: Scattering of gravity waves in subcritical flows over an obstacle, theoretical and experimental progresses
Start: 2016-05-05T15:00:00+02:00
End: 2016-05-05T16:00:00+02:00
Location: Dipartimento di fisica e Astronomia

by Prof. Renaud Parentani (Laboratoire de Physique Théorique, Université de Paris-Sud Orsay)

Thursday 5 May 2016, 15:00 → 16:00 Europe/Rome

Aula Teorici (Dipartimento di fisica e Astronomia)

Aula Teorici

Dipartimento di fisica e Astronomia

Via Irnerio, 46

Description

In 1981 Unruh suggested that one might test the Hawking effect by studying the scattering of linear perturbations in trans-critical flows. Since then, several experiments have been carried out in different settings. We here report on progresses in the study of surface waves in water tanks. The first progress concerns the modification of the scattering coefficients when dealing with subcritical flows as opposed to transcritical ones. The second concerns the a new method of extracting the scattering coefficients by using correlations (constructive interferences) between various waves.