Measuring shifts in spin energy levels with pHz sensitivity

Michael Romalis

I will talk about our efforts to improve the precision of spin precession measurements using large ensembles of noble gas atoms. These systems have hours-long spin coherence times and are ideally suited for measurements of small energy shifts. Our most recent experiment uses a co-magnetometer comparing precession frequencies of Ne-21 and He-3 atoms using an in-situ Rb magnetometer. We have developed methods to reduce interactions between the spin ensembles which can create additional frequency shifts. The fundamental physics that can be studied with such measurements includes Lorentz and CPT violation, spin-gravity couplings and spin-interacting dark matter.

http://scgp.stonybrook.edu/video_portal/video.php?id=5760

Simons- Workshop: Lighting New Lampposts for Dark Matter and Beyond the Standard Model