Experiments on a videotape atom chip: fragmentation and transport studies

Details Experiments on a videotape atom chip: fragmentation and transport studies Experiments on a videotape atom chip: fragmentation and transport studies

2010-03-23

arxiv.org/abs/1003.4490v1

New J. Phys. 12 (2010) 093017

Physics

Atomic Physics

29 pages, 22 figures.

Scientific paper

This paper reports on experiments with ultra-cold rubidium atoms confined in microscopic magnetic traps created using a piece of periodically-magnetized videotape mounted on an atom chip. The roughness of the confining potential is studied with atomic clouds at temperatures of a few microKelvin and at distances between 30 and 80 microns from the videotape-chip surface. The inhomogeneities in the magnetic field created by the magnetized videotape close to the central region of the chip are characterized in this way. In addition, we demonstrate a novel transport mechanism whereby we convey cold atoms confined in arrays of videotape magnetic micro-traps over distances as large as ~ 1 cm parallel to the chip surface. This conveying mechanism enables us to survey the surface of the chip and observe potential-roughness effects across different regions.

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