Bose-Einstein Condensation Temperature of Dipolar Gas in Anisotropic Harmonic Trap
arXiv:cond-mat/0609374 · doi:10.1103/PhysRevA.76.023604
Abstract
We consider a dilute gas of dipole moments in an arbitrary harmonic trap and treat both the short-range, isotropic delta-interaction and the long-range, anisotropic dipole-dipole interaction perturbatively. With this we calculate the leading shift of the critical temperature with respect to that of an ideal gas as a function of the relative orientation of the dipole moments with respect to the harmonic trap axes. In particular, we determine those magic angles, where the dipolar shift of the Bose-Einstein condensation temperature vanishes. Furthermore, we show for the parameters of the ongoing 52Cr-experiment in Stuttgart that this dipolar shift can be enhanced by increasing the number of particles, the geometrical mean trap frequency, and the anisotropy of the trap.
arXiv commentAuthor information under http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir
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