Berlin 2005 – wissenschaftliches Programm

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SYUA: Mesoscopic Physics of Ultracold Atoms

SYUA 1: Atom Chip Physics

SYUA 1.1: Hauptvortrag

Mittwoch, 9. März 2005, 11:00–11:30, HU Audimax

Atom Chips: Mesoscopic Physics with Cold Atoms — •Jörg Schmiedmayer — Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany

In mesoscopic quantum electronics, electrons move inside semiconductor structures and are manipulated using potentials where at least one dimension is comparable to the de-Broglie wavelength of the electrons. Similar potentials can be created for neutral atoms moving microns above surfaces using charged and current carrying structures nano-fabricated onto a surface. We will give an overview of the experiments studying the manipulation of cold thermal atoms and BECs on Atom Chips. Atoms can be held and manipulated in strongly confining traps and guides using magnetic, electric and optical fields. Using our atom chips, lithographically fabricated into high quality evaporated Gold layers, previously observed huge disorder potentials are orders of magnitude smaller in our experiments. With Bose-Einstein condensates as a sensitive probe, we could study the spatial variation of magnetic potentials down surface distances in the mikrometer range. A series of experiments are performed by looking at various topics in mesoscopic and 1-d physics of degenerate quantum gases in, and far from, thermal equilibrium.