MAMACASS: Measurement And Microscopy Applying Cold Atom Surface Sensors

Quantum sensors based on ultracold atoms offer the highest sensitivity and accuracy across many sensing domains. Here, we present work towards an atom-based quantum sensing platform for quantum materials, where the sensing needs are diverse and challenging. MAMACASS is a multi-modal apparatus for cryogenic trapping of single atoms and Bose-Einstein condensates in optical tweezers, comprising a measurement suite for surface science that leverages the unique features of atom-based probes. These include (1) excitation to Rydberg states enables high sensitivity to Casimir-Polder energy shifts, revealing details of the material electromagnetic Green’s function; (2) magnetic- and electric-field based sensing of material domains; and (3) large-area Bose-Einstein condensate-based probes of vortices, magnetic domains, and surface features.