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Investigation of Feshbach Resonances in ultra-cold 40K spin mixtures

Published

Author(s)

Eite Tiesinga, J Krauser, J Heinze, S Gotze, M Lanbecker, N Flashner, L Cook, T Hanna, K Sengstock, C Becker

Abstract

Magnetically-tunable Feshbach resonances are an indispensable tool for experiments with atomic quantum gases. We report on twenty thus far unpublishedi Feshbach resonances and eleven further probable Feshbach resonances in spin mixtures of ultracold fermionic 40K with temperatures well below 100 nK. In particular, we locate a broad resonance at B = 389.6 G with a magnetic width of 26.4 G. Here 1 G = 10-4 T. Furthermore, by exciting low-energy spin waves, we demonstrate a novel means to precisely determine the zero crossing of the scattering length for this broad Feshbach resonance. Our findings allow for further tunability in experiments with ultracold 40K quantum gases.
Citation
Physical Review A
Volume
95

Keywords

ultracold atoms, collisional resonances

Citation

Tiesinga, E. , Krauser, J. , Heinze, J. , Gotze, S. , Lanbecker, M. , Flashner, N. , Cook, L. , Hanna, T. , Sengstock, K. and Becker, C. (2017), Investigation of Feshbach Resonances in ultra-cold 40K spin mixtures, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.95.042701 (Accessed April 18, 2024)
Created April 3, 2017, Updated November 10, 2018