Effect of vortices on the spin-flip lifetime of atoms in superconducting atom-chips

Details Effect of vortices on the spin-flip lifetime of atoms in superconducting atom-chips Effect of vortices on the spin-flip lifetime of atoms in superconducting atom-chips

2009-07-21

arxiv.org/abs/0907.3598v1

Physics

Quantum Physics

accepted for publication in EPL on June 25 2009

Scientific paper

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.

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