Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 32: MLT: Quantum Liquids, Bose-Einstein Condensates, Ultra-cold Atoms, ... 2

TT 32.10: Vortrag

Donnerstag, 25. März 2010, 16:45–17:00, H18

Néel transition of fermionic atoms in an optical trap: real-space DMFT study — •Elena Gorelik and Nils Blümer — Institut für Physik, Universität Mainz, Mainz, Germany

We study theoretically the magnetic ordering transition for a system of repulsively interacting fermionic atoms harmonically trapped in a three-dimensional optical lattice. The real-space DMFT approach [1] combined with Hirsch-Fye quantum Monte Carlo (QMC) impurity solver is used to explore the temperature effects on the ordering phenomena, and to establish signatures of Néel transitions in experimentally accessible observables. We also provide estimates of the entropy for the calculated systems.

[1] M. Snoek et al., New Journal of Physics 10, 093008 (2008).