Surface-electrode trap with an integrated permanent magnet for generating a magnetic-field gradient at trapped ions

@article{Kawai2016SurfaceelectrodeTW,
  title={Surface-electrode trap with an integrated permanent magnet for generating a magnetic-field gradient at trapped ions},
  author={Yuji Kawai and Kenji Shimizu and Atsushi Noguchi and Shinji Urabe and U. Tanaka},
  journal={arXiv: Atomic Physics},
  year={2016}
}
We report on a surface-electrode trap with SmCo magnets arranged in a quadrupole configuration underneath the trap electrode. Because the distance between the magnets and the trapped ions can be as little as several hundred micrometers, a large magnetic field is produced without any heat management. The magnetic-field gradient was measured using the Zeeman splitting of a single trapped $^{40}$Ca$^+$ ion at several positions, and a field gradient of 36 T/m was obtained. Such a field gradient is… 
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