Smooth inductively coupled ring trap for atoms

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We propose and numerically investigate a scalable ring trap for cold atoms that surmounts problems of roughness of the potential and end effects of trap wires. A stable trapping potential is formed about an electrically isolated, conducting loop in an ac magnetic field by time averaging the superposition of the external and induced magnetic fields. We investigate the use of additional fields to eliminate Majorana spin-flip losses and to create a stable trapping geometry. The possibility of microfabrication of these ring traps offers the prospect of developing Sagnac atom interferometry in atom-chip devices.
Original languageEnglish
Article number051402(R)
Number of pages4
JournalPhysical Review A
Issue number5
Early online date13 May 2008
Publication statusPublished - May 2008


  • neutral atoms
  • cold atoms
  • surface
  • optics
  • chip


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