Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 13: Poster HU 2
A 13.55: Poster
Dienstag, 8. März 2005, 08:30–18:30, Poster HU
1D experiments on atom chips — •Elmar Haller1, Sebastian Hofferberth1, Stephan Wildermuth1, Peter Krüger1, Daniel Gallego-Garcia1, Sönke Groth1,2, Mauritz Anderson1, Israel Bar-Joseph2, and Jörg Schmiedmayer1 — 1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg — 2Weizmann Institut, Rehovot, Israel
Atom chips allow to control and manipulate thermal clouds and BECs using magnetic and electrostatic fields. Current and charge carrying structures on the chip surface give great flexibility in the design of complex trapping potentials. This poster focuses on the possibility to use these potentials to confine atoms to an essentially one dimensional motion. First experiments in the quasi one-dimensional regime will be presented, reaching aspect ratios greater than 1000 between transversal and longitudinal trap frequencies. For thermal clouds the temperature can be decreased below the spacing of the transversal energy levels and in case of Bose-Einstein condensates the transverse ground state energy exceeds the chemical potential. By changing the aspect ratio locally and time dependent, transitions between different regimes of the quantum gas can be examined continuously.