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Q: Quantenoptik und Photonik

Q 34: Poster Quantengase

Q 34.14: Poster

Dienstag, 14. März 2006, 16:30–18:30, Labsaal

Many-body quantum states in few mode Hamiltonians and applications to bosonic spinor gases — •Carsten Weiß, Reinhold Walser, Lev Plimak, and Wolfgang P. Schleich — Abteilung Quantenphysik, Universität Ulm, Germany

Well isolated trapped spinor Bose-Einstein condensates [1-3] represent an ideal environment to investigate exact many-body dynamics of simple spin systems [4, 5]. The great challenge of many body physics is to find the appropriate physical description that aids the intuition.

In this contribution, we will discuss few mode bosonic Hamiltonians, which arise naturally from spinor Bose-Einstein condensates. We will compare the number-symmetry breaking mean-field approximation with exact numerical solutions of the many-body Schrödinger equation. Furthermore, we will introduce convenient analytical approximations for the stationary many-body eigenstates.

[1] W. Zhang et al., Phys Rev. A, 72, 013602 (2005).

[2] J. Kronjäger et al., Phys. Rev. A, 72, 1 (2005).

[3] L. Plimak, C. Weiß, R. Walser and W.P. Schleich, Opt. Comm. submitted (2005).

[4] J. R. Anglin, P. Drummond, and A. Smerzi, Phys. Rev. A, 64, 063605 (2001).

[5] M. Holthaus, Phys. Rev. A, 64, 11601(R) (2001).