Qi, Wei Liang, Zhaoxin Zhang, Zhidong Evolution of the condensate width in the radially symmetric case for the negative s-wave scattering length with different <em>G</em> <p><strong>Figure 6.</strong>Ā Evolution of the condensate width in the radially symmetric case for the negative s-wave scattering length with different <em>G</em>.</p> <p><strong>Abstract</strong></p> <p>We take into account the higher-order corrections in two-body scattering interactions within a mean-field description, and investigate the stability conditions and collective excitations of a harmonically trapped Boseā€“Einstein condensate (BEC). Our results show that the presence of higher-order corrections causes drastic changes to the stability condition of a BEC. In particular, we predict that with the help of the higher-order interaction, a BEC can now collapse even for positive scattering lengths; whereas, a usually unstable BEC with a negative scattering length can be stabilized by positive higher-order effects. The low-lying collective excitations are significantly modified as well, compared to those without the higher-order corrections. The conditions for a possible experimental scenario are also proposed.</p> bec;correction;results show;excitation;stability conditions;stability condition;interaction;condensate width;length;Atomic Physics;Molecular Physics 2013-08-19
    https://iop.figshare.com/articles/figure/_Evolution_of_the_condensate_width_in_the_radially_symmetric_case_for_the_negative_s_wave_scattering/1012592
10.6084/m9.figshare.1012592.v1