Dark matter constitutes most of the matter in our Universe, yet its microscopic nature remains unknown. Astronomical observations have motivated increasing interest in ultralight dark matter, with particle masses below the 10 eV/c^2 scale (≈10^-35 kg).

In this talk, I will introduce how quantum sensing can probe such dark matter, focusing on the Cosmic Axion Spin Precession Experiment (CASPEr), which uses nuclear magnetic resonance (NMR) to search for axions and axionlike particles. I will provide introductory-level background on dark matter, axions, and spin-based detection, followed by our recent results and the latest experimental developments in our lab.

No prior knowledge is required.