Ultracold collisions in traps [Elektronische Ressource] : control of ultracold two-body collisions by trapping potentials and by magnetic fields near Feshbach resonances / von Sergey Grishkevich

Ultracold collisions in trapsControl of ultracold two-body collisions by trapping potentialsand by magnetic fields near Feshbach resonancesDISSERTATIONzur Erlangung des akademischen Gradesdoctor rerum naturalium(Dr. rer. nat.)im Fach Physikeingereicht an derMathematisch-NaturwissenschaftlichenFakultät IHumboldt-Universität zu BerlinvonSergey Grishkevichgeboren am 30.05.1980 in ChargevPräsident der Humboldt-Universität zu Berlin:Prof. Dr. Dr. h.c. Christoph MarkschiesDekan der Mathematisch-NaturwissenschaftlichenFakultät I:Prof. Dr. rer. nat. habil. Lutz-Helmut SchönGutachter:1. Prof. Dr. Peter Schmelcher2. Prof. Dr. Tommaso Calarco3. PD Dr. Alejandro Saenzeingereicht am: 17.08.2009Tag der mündlichen Prüfung: 22.10.2009AbstractThe ultracold atomic and molecular physics as it is accessible, e.g., inBose-Einstein condensates of dilute gases was investigated. In such systemstwo-body collisions are dominant and their detailed study is one of the cen-tral topics of this work. They were done considering elementary chemicalreactions as photoassociation, and magnetic Feshbach resonances. Addition-ally, studies of atoms in optical lattice sites were carried out. The many-bodysystems were not only considered within the usually adopted mean-field ap-proach but also beyond that in order to simulate the fully correlated motion.A collision of two particles is in general a multi-channel problem.