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arXiv · 2007.12389

Magnetic dipolar interaction between hyperfine clock states in a planar alkali Bose gas

Y. -Q. Zou·B. Bakkali-Hassani·C. Maury·É. Le Cerf·S. Nascimbene·J. Dalibard·J. Beugnon
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Abstract

In atomic systems, clock states feature a zero projection of the total angular momentum and thus a low sensitivity to magnetic fields. This makes them widely used for metrological applications like atomic fountains or gravimeters. Here, we show that a mixture of two such non-magnetic states still display magnetic dipole-dipole interactions. Using high resolution spectroscopy of a planar gas of $^{87}$Rb atoms with a controlled in-plane shape, we explore the effective isotropic and extensive character of these interactions and demonstrate their tunability. Our measurements set strong constraints on the relative values of the s-wave scattering lengths $a_{ij}$ involving the two clock states.

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Y. -Q. Zou, B. Bakkali-Hassani, C. Maury, É. Le Cerf, S. Nascimbene, J. Dalibard, J. Beugnon. 2020-07-24. Magnetic dipolar interaction between hyperfine clock states in a planar alkali Bose gas. https://doi.org/10.1103/physrevlett.125.233604

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