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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Gases: Mixtures and Spinor Gases
Q 24.5: Vortrag
Mittwoch, 10. März 2010, 11:30–11:45, E 001
Dynamical Correlations in Spinor-Bose Gases — Jürgen Bosse1, •Benno Liebchen1, and Axel Pelster2,3 — 1Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut für Physik und Astronomie, Karl-Liebknecht-Str. 24 14476 Potsdam, Germany — 3Fachbereich Physik, Universität Duisburg-Essen, Lotharstrasse 1, 47048 Duisburg, Germany
The dynamical structure factor S(q,ω) and the response spectrum G″(q,ω) of both particle and magnetization density have been calculated for trapped ideal F=1 spinor-Bose gases at finite temperatures. Such systems with fixed magnetization are known to show two BEC phase transitions [1]. The resulting nonlinear relation between the magnetic field and the magnetization is presented for various temperatures. In the special case of a homogeneous system, earlier results for the linear magnetic susceptibility are reproduced [2,3].
[1] T. Isoshima, T. Ohmi, and K. Machida, J. Phys. Soc. J. 69, 3864 (2000)
[2] J. Bosse, K.N. Pathak, and G.S. Singh, arXiv:0912.2833, Physica A 389, 408 (2010)
[3] J. Bosse, K.N. Pathak, and G.S. Singh, arXiv:0912.2841