Conveners
Monday PM
- Wen Yin
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Sugumi Kanno27/09/2021, 14:00Invited
In this talk, I will discuss the production of axions from the vacuum caused by the expansion of the Universe. I will show the axions evolve as a squeezed state during inflation and become a highly entangled state. Such a quantum squeezed state of axions remains after horizon re-entry. I also discuss the observability of the quantum coherence of axions.
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Etienne Savalle27/09/2021, 14:40
The DAMNED experiment is a new type of experiment that compares the frequency of a clock to itself in the past, by "storing" photons in a fibre delay line.
In ultra-light oscillating dark matter (DM) models, the coupling of DM to the standard model fields yields an oscillation of fundamental constants, which in turn leads to oscillations of the cavity and fibre lengths and of the fibre...
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Pierre Brun27/09/2021, 15:05
P. Brun, L. Chevalier, C. Flouzat, A. Hees, P. Polovodov, E. Savalle, P. Wolf
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The Shuket experiment aims at detecting light scalar dark matter in the form of hidden photons. Shuket stands for SearcH for U(1) darK matter with an Electromagnetic Telescope, it is designed as a metallic spherical cap with a radiometer at its center. We present the results of a re-analysis of a dataset presented... -
Joerg Jaeckel27/09/2021, 15:40Invited
In this talk we will look at axion-like particles, and other very feebly interacting (light) dark matter candidates. In particular we will look at some more unusual features and models.
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Yuko Urakawa27/09/2021, 16:20Invited
We establish strong gravitational lens systems as robust probes of axion-like particles (ALPs) -- a candidate for dark matter. A tiny interaction of photons with ALPs induces birefringence. Multiple images of gravitationally lensed polarised objects allow differential birefringence measurement, alleviating systematics and astrophysical dependencies. We apply this novel method to the lens...
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Alexandra Sheremet27/09/2021, 17:00
The search of transient space variation of fundamental constant, like the fine structure constant or the proton-to-photon mass ratio in the neighborhood of the Earth, is the interest of last decades. In this context, atomic clocks can present an astonishing tool for study fundamental physics in terms of detection of a possible frequency shift, which is a result of GPS network interaction with...
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