Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 17: Fermi Quantum Gas
Q 17.2: Vortrag
Dienstag, 15. März 2011, 10:45–11:00, BAR Schön
Deterministic preparation and control of a few-fermion system — •Gerhard Zürn1,2, Thomas Lompe1,2,3, Timo Ottenstein1,2,3, Martin Ries1,2, Friedhelm Serwane1,2,3, Andre Wenz1,2, and Selim Jochim1,2,3 — 1Physikalisches Institut, Universität Heidelberg — 2MPI für Kernphysik, Heidelberg — 3ExtreMe Matter Institute EMMI, GSI, Darmstadt
Systems composed of only few interacting fermions are common in nature. The most prominent examples are atoms and nuclei. However, these systems have limited tunability. In contrast microscopic quantum systems consisting of ultracold atoms can provide tunable artificial atoms if they can be prepared in well defined quantum states.
To prepare such systems we load a micrometer-sized trap from a shallow optical dipole trap containing a two-component degenerate Fermi gas. To control the number of atoms in the microtrap we spill the excess atoms from the upper levels of the microtrap potential by applying a magnetic field gradient.
Using this technique, we have prepared ground state samples of one to ten atoms with fidelities of ∼ 90%.
Due to the tunability of the interaction strength our system is suited for quantum simulation with fully controlled few-body systems.