Interacting Bose-Fermi mixtures in optical lattices [Elektronische Ressource] / Thorsten Best

Interacting Bose-Fermi mixturesin optical latticesDissertationzur Erlangung des GradesDoktorder Naturwissenschaftenam Fachbereich Physik, Mathematik und Informatik¨der Johannes Gutenberg-Universitatin MainzThorsten Bestgeboren in BonnMainz, den 11. Oktober 2010D771. Berichterstatter:2. Berichterstatter:Datum der mundlic hen Prufung: 27. Mai 2011AbstractIn this thesis, we investigate mixtures of quantum degenerate Bose andFermi gases of neutral atoms in threedimensional optical lattices. Fesh-bach resonances allow to control interspecies interactions in these systemsprecisely, by preparing suitable combinations of internal atomic states andapplying external magnetic fields. This way, the system behaviour can betuned continuously from mutual transparency to strongly interacting cor-related phases, up to the stability boundary. The starting point for theseinvestigationsisthespin-polarizedfermionicbandinsulator. Thepropertiesof this non-interacting system are fully determined by the Pauli exclusionprinciple for the occupation of states in the lattice. A striking demonstra-tion of the latter can be found in the antibunching of the density-densitycorrelationofatomsreleasedfromthelattice. Ifbosonicatomsareaddedtothis system, isolated heteronuclear molecules can be formed on the latticesites via radio-frequency stimulation.