Frankfurt 2006 – scientific programme

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Q: Quantenoptik und Photonik

Q 48: Gruppenberichte Quantengase

Q 48.1: Group Report

Wednesday, March 15, 2006, 14:00–14:30, HVI

Matter-wave interferometry on an atom chip using radio-frequency induced adiabatic potentials — •Sebastian Hofferberth¹, Thorsten Schumm², Igor Lesanovsky¹, Peter Krüger³, L. Mauritz Andersson⁴, Stephan Wildermuth¹, Bettina Fischer¹, Jose Verdu¹, and Jörg Schmiedmayer¹ — ¹Physikalisches Institut, Universität Heidelberg,D-69120 Heidelberg, Germany — ²Laboratoire Charles Fabry de l’Institut d’Optique, UMR 8105 du CNRS, F-91403 Orsay, France — ³Laboratoire Kastler Brossel, École Normale Sup∖érieure, 24 Rue Lhomond, F-75005 Paris, France — ⁴Department of Microelectronics and Information Technology, The Royal Institute of Technology, SE-164 40, Kista, Sweden

We describe the implementation of Radio-frequency (RF) induced adiabatic potentials as a new tool for creating complex trapping potentials for neutral atoms on scales orders of magnitude smaller than the atom chip structures. Together with our nanofabricated atom chips with exceptionally small disorder potentials this allows the realization of a coherent atom chip beam splitter for trapped Bose-Einstein condensates. We study the coherent quantum evolution throughout the splitting process in detail. The enhanced flexibility of RF induced potentials allow the implementation of novel trapping configurations, such as ring and zylinder shaped 1d and 2d potnentials or a Mach-Zehnder interferometer. Their realization, utilizing simple and highly integrated wire geometries and experimental implementations are presented.

[1] T. Schumm et al., Nature Physics 1, 57, (2005). [2] I. Lesanovsky et al., arXiv:quant-ph/0510076.