2013/10/31 by Abdelaali Boudjemaa · 1 citation
Physics and Astronomy · #cond-mat.quant-gas
published as J. Phys. B: At. Mol. Opt. Phys. 48 035302 (2015) · 6 pages, 1 figure, (published version)
arxiv created 2014/12/03 · arxiv updated 2015/01/15
We present a systematic study of dilute three-dimensional dipolar Bose gas employing a finite temperature perturbation theory (beyond the mean field). We analyze in particular the behavior of the anomalous density, we find that this quantity has a finite value in the limit of weak interactions at both zero and finite temperatures. We show that the presence of the dipole-dipole interaction (DDI) enhances fluctuations, the second order correlation function and thermodynamic quantities such as the chemical potential, the ground state energy, the compressibility and the superfluid fraction. We identify the validity criterion of the small parameter of the theory for Bose-condensed dipolar gases.