Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 7: Matter at Low Temperature: Poster Session
TT 7.19: Poster
Montag, 25. Februar 2008, 14:00–18:00, Poster B
Charge-density-waves of trions in an optical lattice — •Csaba Toke1, Akos Rapp2, Walter Hofstetter1, and Gergely Zarand2 — 1J. W. Goethe-Universit\"at, Frankfurt am Main, Deutschland — 2Technologische Universit\"at, Budapest, Ungarn
When fermions of three hyperfine state are loaded into an optical lattice, they provide an almost perfect implementation of the SU(3) Hubbard model. For the case of attractive interactions it was shown in previous work [Rapp et al., PRL 98, 160405 and arXiv:0707.2378] that with increasing interaction strength the color superfluid state goes over to a trionic phase in infinite dimensions. We extend this study to experimentally relevant finite dimensions, and analyze the additional structure that emerges due to the inter-trionic repulsion, which is due to suppression of quantum fluctuations for nearby trions. This interaction is derived, and the resulting density ordering instability is studied on the RPA level.