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TT: Fachverband Tiefe Temperaturen

TT 41: Matter at Low Temperature: Quantum Liquids, Bose-Einstein-Condensates, Ultra-cold Atoms

TT 41.10: Vortrag

Donnerstag, 26. März 2009, 16:30–16:45, HSZ 105

Trionic liquids in exact diagonalization — •Guido Klingschat and Carsten Honerkamp — TP1, Universität Würzburg

Lattice fermions with three internal degrees of freedom ('colors') exhibit a trionic phase with conglomerates of 3 fermions on a single site if the onsite attraction between the different colors is strong enough. Using excact diagonalization we establish an effective Hamiltonian describing these fermionic quasiparticles. The effective theory is validated by a finite size scaling in the low density limit. The stability of the trion phase against breaking of the global SU(3)-symmetry is investigated for asymmetric interactions as well as for different densities per color. Furthermore we compare the trion behavior for one and two lattice dimensions.