Wednesday, May 8, 2013

1305.1604 (S. K. Adhikari)

Stability and collapse of fermions in a binary dipolar boson-fermion
164Dy-161Dy mixture

S. K. Adhikari
We suggest a time-dependent mean-field hydrodynamic model for a binary dipolar boson-fermion mixture to study the stability and collapse of fermions in the 164Dy-161Dy mixture. The condition of stability of the dipolar mixture is illustrated in terms of phase plots. A collapse is induced in a disk-shaped stable binary mixture by jumping the interspecies contact interaction from repulsive to attractive by the Feshbach resonance technique. The subsequent dynamics is studied by solving the time-dependent mean-field model including three-body loss due to molecule formation in boson-fermion and boson-boson channels. Collapse and fragmentation in the fermions after subsequent explosions are illustrated. The asymmetric dipolar interaction leads to asymmetric fermionic density distribution during collapse. The present study is carried out in three-dimensional space using realistic values of dipolar and contact interactions.
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