Detailseite
Projekt
Superfluidity in two species Fermi-Fermi mixtures
Antragsteller
Dr. Kai Dieckmann
Fachliche Zuordnung
Optik, Quantenoptik und Physik der Atome, Moleküle und Plasmen
Förderung
Förderung von 2007 bis 2011
Projektkennung
Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 28567861
The main goal of this project is to realize and study quantum gas of two fermionic atomic species in the strongly interacting regime in the vicinity of a Feshbach resonance. Such a Fermi-Fermi mixture is expected to have a long lifetime, as inelastic decay is suppressed by the Pauli Exclusion Principle. Points of interest to study are the formation of heteronuclear molecules and the effect of the mass difference on the superfluid phase near the resonance. The former is related to the far goal of transferring the molecules to their absolute ground state and thus creating a quantum gas with dipolar interaction. As a first step we manipulate and perform spectroscopy of the internal states of the molecules by optical excitation subsequent photoionization detection. The heteronuclear mixture is expected to exhibit a spatially inhomogeneous superfluid phase that is related to the so called LOFF phase that has been predicted to occur in superconductivity. In particular in a one dimensional trapping configuration achieved by an optical lattice potential the density profile can be conveniently detected and compared to exact theoretical solutions. Both directions are examples for the suitability of ultracold fermionic gases to serve as essential models for analogous systems of condensed matter physics.
DFG-Verfahren
Forschungsgruppen
Beteiligte Person
Professor Dr. Theodor W. Hänsch
