Speaker
Description
The total mass density of the Universe appears to be dominated by dark matter. However, beyond its gravitational interactions at the galactic scale, little is known about its nature. We have shown that a single optical atomic clock can be used as a detector for the hypothetical dark matter in the form of stable topological defects, for example, monopoles, strings or domain walls. We exploited differences in the susceptibilities to the fine-structure constant of essential parts of an optical atomic clock, i.e. the atoms and the cavity. We perform an experiment which constrained the strength of atomic coupling to hypothetical dark-matter cosmic objects. Under the conditions of our experiments, the degree of constraint was found to exceed the previously reported limits by more than three orders of magnitude.
| Author's Name | Michal Zawada |
|---|---|
| Author's Institute | Institute of Physics, Nicolaus Copernicus University |
| Author's e-mail | zawada@fizyka.umk.pl |
| Abstract Title | Experimental constraint on dark matter-Standard Model coupling with optical atomic clocks |
| Subject | BSM+DM |
