Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 9: Ultra-Cold Atoms, Ions and BEC II (with Q)
A 9.3: Vortrag
Mittwoch, 10. März 2010, 11:00–11:15, F 303
Superconducting Atom Chips — Tobias Mueller1,2, Rachele Fermani1,2, Bo Zhang1, Kin Sung Chan1, Michael J. Lim1,3, and •Rainer Dumke1 — 1School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore — 2Centre for Quantum Technologies, National University of Singapor, Singapore — 3Rowan University, New Jersy, USA
We store and control ultra-cold atoms in a new type of trap using magnetic fields of vortices in a high temperature superconducting micro-structure. This is the first time ultra-cold atoms have been trapped in the field of magnetic flux quanta. We generate the attractive trapping potential for the atoms by combining the magnetic field of a superconductor in the remanent state with external homogeneous magnetic fields. We show the control of crucial atom trap characteristics such as an efficient intrinsic loading mechanism, spatial positioning of the trapped atoms and the vortex density in the superconductor. The measured trap characteristics are in good agreement with our numerical simulations.