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Q: Fachverband Quantenoptik und Photonik
Q 63: Quantengase (Wechselwirkungseffekte II / Spinorgase)
Q 63.6: Talk
Friday, March 14, 2008, 15:15–15:30, 3G/H
Fermi Gases with Arbitrary Spin — •Aristeu Lima1 and Axel Pelster2 — 1Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Fachbereich Physik, Universität Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany
After the experimental realization of Bose-Einstein condensation in optical traps, where the spin degree of freedom of the bosonic atoms is no longer frozen, the question has arisen whether also fermionic atoms can be optically trapped. In fact, such a system has recently been experimentally realized with 173Yb atoms [1]. Other promising examples of fermionic systems with a total angular moment F in the ground state which is larger than 1/2 are all alkali fermions (except 6Li) and 53Cr. Thus, now many interesting physical properties of spinor Fermi gases can be studied. Concerning the contact interaction, many pairing channels can occur. Furthermore, an additional dipole-dipole interaction, responsible for anisotropic superfluidity, plays a major role in 53Cr, which has six valence electrons. Having these applications in mind, we calculate the ground-state energy of such systems perturbatively with respect to the two-particle interaction.
[1] T. Fukuhara et al. Phys. Rev. Lett. 98, 030401 (2007)