### Ultralight dark matter
* Scalar coupling DM-SM: shift in atomic levels
* Monitor frequencies with atomic clocks
### Space-time separated sensors
* Access to otherwise unconstrained couplings
* Unique signals: scale with network size, daily modulations
### Benjamin M. Roberts
_School of Mathematics and Physics,_
_University of Queensland, Australia_
* Slides [broberts.io/talks](https://broberts.io/talks)
* Caddell, Flambaum, BMR, [Phys. Rev. D **108**, 083030 (2023)](https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.083030)
* Savalle _et al._, [Phys. Rev. Lett. **126**, 051301 (2021)](https://link.aps.org/doi/10.1103/PhysRevLett.126.051301)
* BMR _et al._, [Nature Comms. **8**, 1195 (2017)](http://www.nature.com/articles/s41467-017-01440-4)
* BMR _et al._, [N. J. Phys. **22**, 093010 (2020)](https://iopscience.iop.org/article/10.1088/1367-2630/abaace)
* Hees, Do, BMR, Ghez _et al._, [Phys. Rev. Lett. **124** 081101
(2020)](https://link.aps.org/doi/10.1103/PhysRevLett.124.081101)
* Filzinger, Caddell _et al._, [Phys. Rev. Lett. **134**, 031001 (2025)](https://doi.org/10.1103/PhysRevLett.134.031001)
Supported by: ARC and