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Frankfurt 2006 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 8: Quantengase II

Q 8.6: Vortrag

Montag, 13. März 2006, 15:15–15:30, HVI

Critical Temperatures of F=1 Spinor Condensate — •Parvis Soltan-Panahi1, Axel Pelster2, and Hagen Kleinert11Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Fachbereich Physik, Universität Duisburg-Essen, Universitätsstraße 5, 45117 Essen, Germany

Applying the functional integral approach of many-body theory, we investigate the thermodynamical properties of a spinor condensate with spin F=1. At first, we neglect any two-particle interaction and compute the temperature dependence of the specific heat and the magnetic susceptibility. Furthermore, we determine how the critical temperatures for the occurrence of the ferromagnetic and the antiferromagnetic phase change with the magnetization of the system. Finally, we elaborate how these critical temperatures are affected by additional short-range two-particle interactions within a mean-field approximation.

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