Quantum sensing of axion dark matter

by Takis Kontos (Ecole Normale Supérieure de Paris)

Tuesday 17 Dec 2024, 16:00 → 18:00 Europe/Berlin

Auditorium (DESY Hamburg)

Axions are hypothetical particles which do not belong to the standard model and are considered good candidates to explain the dark matter in the Universe. As first proposed by P. Sikivie in 1983, it may be possible to detect them using a microwave cavity under a large magnetic field. Such a device is called a haloscope. After reviewing the recent efforts and developments regarding conventional haloscopes, I will describe a new type of haloscope which we have recently developed. It combines a superconducting quantum circuit, an antiferromagnetic crystal in addition to the microwave cavity. It aims to detect the axion signal by measuring a phase shift of the microwave signal. Furthermore, the antiferromagnetic crystal provides a tunability, enabling in principle a large mass scanning range. It is expected to have an unprecedented figure of merit and mass scanning range. I will present both the concept and the first experimental results of our haloscope.

We invite you to attend the presentation at the DESY auditorium. We also offer a webcast:

https://desy.zoom.us/j/99616528733

Meeting ID: 996 1652 8733 
Meeting Password: 733220

2024-12-17 Physics Colloquium.mp4

colloqiumKontos_DESYgood.pdf

PAcolloquium-poster_Kontos_19122024.pdf