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Interferometric measurement of interhyperfine scattering lengths in $^{87}$Rb by Gomez, Pau; Mazzinghi, Chiara; Martin, Ferran; Coop, Simon; Palacios, Silvana; Mitchell, Morgan W. is a scholarly article available to read on EtoBox.

What is Interferometric measurement of interhyperfine scattering lengths in $^{87}$Rb about?

We present interferometeric measurements of the $f=1$ to $f=2$ inter-hyperfine scattering lengths in a single-domain spinor Bose-Einstein condensate of $^{87}$Rb. The inter-hyperfine interaction leads to a strong and state-dependent modification of the spin-mixing dynamics with respect to a non-interacting description. We employ hyperfine-specific Faraday-rotation probing to reveal the evolution of the transverse magnetization in each hyperfine manifold for different state preparations, and a comagnetometer strategy to cancel laboratory magnetic noise. The method allows precise determination of inter-hyperfine scattering length differences, calibrated to intra-hyperfine scattering length differences. We report $(a_{3}^{(12)}-a_{2}^{(12)})/(a_{2}^{(1)}-a_{0}^{(1)})=-1.27(15)$ and $(a_{1}^{(12)}-a_{2}^{(12)})/(a_{2}^{(1)}-a_{0}^{(1)})=-1.31(13)$, limited by atom number uncertainty. With achievable control of atom number, we estimate precisions of $ \approx 0.3\%$ should be possible with this technique.

Author

Gomez, Pau; Mazzinghi, Chiara; Martin, Ferran; Coop, Simon; Palacios, Silvana; Mitchell, Morgan W.

Published

2019

Language

EN