Volume 87, Number 1, July 2009
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||24 July 2009|
Effect of vortices on the spin-flip lifetime of atoms in superconducting atom-chips
Laboratoire Kastler Brossel, ENS, UPMC, CNRS - 24 rue Lhomond, 75005 Paris, France, EU
2 Collège de France - 11 place Marcelin Berthelot, 75005 Paris, France, EU
3 Laboratoire Pierre Aigrain, ENS, UPMC, CNRS - 24 rue Lhomond, F-75231 Paris Cedex 05, France, EU
4 Laboratoire EM2C, Ecole Centrale Paris, CNRS - Grande Voie des Vignes, 92295 Châtenay-Malabry, France, EU
Corresponding author: email@example.com
Accepted: 25 June 2009
We study theoretically the lifetime of magnetically trapped atoms in the close vicinity of a type-II superconducting surface, in the context of superconducting atom-chips. We account for the magnetic noise created at the cloud position by the vortices present in the superconductor and give specific results for our experiment which uses a niobium film. Our main result is that atom losses are dominated by the presence of vortices. They remain however dramatically smaller than in equivalent room-temperature atom-chip setups using normal metals.
PACS: 37.10.Gh – Atom traps and guides / 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 47.32.C- – Vortex dynamics
© EPLA, 2009
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