[staff-physics-and-astronomy-HL-UHD-UD] IoP Colloquium - 16:00-17:00 28/09/2023 - L1.01 Lab42 - prof. Emmanuel Fort (Institut Langevin, ESPCI Paris, PSL University)

Tue Sep 12 08:16:21 CEST 2023

From: Secretariat IoP-UvA <secr-iop-science at uva.nl>
Sent: maandag 11 september 2023 16:04
Subject: [Api-colloq] IoP Colloquium - 16:00-17:00 28/09/2023 - L1.01 Lab42 - prof. Emmanuel Fort (Institut Langevin, ESPCI Paris, PSL University)

Dear everyone,
You are cordially invited to the first IoP Colloquium of this academic year, on Thursday, 28 September, given by prof. Emmanuel Fort (Institut Langevin, ESPCI Paris, PSL University).

Please see the details below:

  *   Date: 28 September
  *   Time: 16:00-17:00
  *   Location: Science Park 904
  *   Room: L1.01 LAB42

Title: Water waves, a unique playground for wave exploration: from time-reversed mirrors and non-quantum wave-particle duality

Abstract:

Although water waves are the only waves we can observe with the naked eyes, they are often treated as singular waves and set apart because they involve complex hydrodynamic phenomena. In this talk, I will show that water waves offer a unique and fruitful playground for the exploration of new exciting wave phenomena and concepts.
I will focus on time-varying materials which can change their properties in times that are short relative to the period of the propagating waves. This is a fast-growing field that opens up new approaches for wave manipulation. While such media are quite challenging to produce for most waves, huge and fast variations can be obtained for water waves using either electrostriction or vertical vibrations of the bath. I will illustrate the remarkable properties of this experimental platform with a few examples. In particular, I will introduce the concept of instantaneous temporal mirrors and show that waves can travel backwards in time and refocus on the sources that created them.
In a modulated time-varying media, the interaction between the source and the waves it emits is enhanced. We have discovered that a droplet bouncing on a vertically vibrating liquid bath can be used as a source. Each time the droplet bounces, it creates waves. Beyond a certain excitation threshold, the droplet undergoes a dynamical coupling with the waves it emits. It becomes self-propelled, driven by the wave field it has created during its previous bounces. This symbiotic object possesses a non-quantum wave-particle duality and exhibits several features previously thought to be specific to the quantum realm. I will show the behavior of these objects in various experiments such as the "Young's slit experiment" and discuss the underlying dynamics due to the time-varying medium.

Drinks and snack will be served after the colloquium, outside of room L1.01.
All information can be found on the IoP website: IoP Colloquium September<https://iop.uva.nl/content/events/2023/09/colloquium-dima-abanin-copy-6.html?origin=YDX0oCAuRaWl9bnbtYhB4g>

If you have any further questions, please contact dr. Arghavan Safavi Naini a.safavinaini at uva.nl<mailto:a.safavinaini at uva.nl>, dr. Rene Gerritsma R.Gerritsma at uva.nl<mailto:R.Gerritsma at uva.nl> and dr. Corentin Coulais C.J.M.Coulais at uva.nl<mailto:C.J.M.Coulais at uva.nl>.

Best regards,

Secretariat Institute of Physics

E: secr-iop-science at uva.nl<mailto:secr-iop-science at uva.nl>
R: C4.261a SP904
T: 020 525 5773

 [Diagram  Description automatically generated with medium confidence]

Universiteit van Amsterdam
Institute of Physics (IoP), FNWI
Postbus 94485 | 1090 GL Amsterdam
Science Park 904 | 1098 XH Amsterdam

Secretariat Institute of Physics

E: secr-iop-science at uva.nl<mailto:secr-iop-science at uva.nl>
R: C4.261a SP904
T: 020 525 5773

 [Diagram  Description automatically generated with medium confidence]

Universiteit van Amsterdam
Institute of Physics (IoP), FNWI
Postbus 94485 | 1090 GL Amsterdam
Science Park 904 | 1098 XH Amsterdam

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