Magnetic field modulation spectroscopy of rubidium atoms

M. J. Lim, Shawn McPoyle, Marc Cervantes

Jin Woo Jun, Ho Seong Lee

Demascoth Kadio, Y. B. Band

We consider optimization of a rubidium atom clock that uses magnetically trapped Bose condensed atoms in a highly elongated trap, and determine the optimal conditions for minimum Allan variance of the clock using microwave Ramsey fringe spectroscopy. Elimination of magnetic field shifts and collisional shifts are considered. The effects of spin-dipolar relaxation are addressed in the optimization of the clock. We find that for the interstate interaction strength equal to or larger than the intrastate interaction strengths, a modulational instability results in phase separation and symmetry breaking of the two-component condensate composed of the ground and excited hyperfine clock levels, and this mechanism limits the clock accuracy.

Thomas Lindvall, Juha Toivonen, Ilkka Juhani Tittonen +2 more

Roger B. M. Clarke, Erling Riis

David M. Lancaster, Ugne Dargyte, Jonathan D. Weinstein

In this work, we optically resolve and detect individual rubidium atoms trapped in solid neon. Additionally, we optically pump the rubidium's spin state using polarized light and measure the spin state via laser-induced fluorescence. When combined with the previously demonstrated magnetic field sensing capabilities of matrix-isolated rubidium atoms, these results are very promising for nanoscale sensing and for performing nuclear magnetic resonance (NMR) spectroscopy of individual molecules cotrapped in the matrix. Published by the American Physical Society 2024