Fermionic bright soliton in a boson-fermion mixture

Details Fermionic bright soliton in a boson-fermion mixture Fermionic bright soliton in a boson-fermion mixture

2005-09-09

arxiv.org/abs/cond-mat/0509257v1

Phys. Rev. A 72 (2005) 053608 (1-7)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 7 ps figures

Scientific paper

10.1103/PhysRevA.72.053608

We use a time-dependent dynamical mean-field-hydrodynamic model to study the formation of fermionic bright solitons in a trapped degenerate Fermi gas mixed with a Bose-Einstein condensate in a quasi-one-dimensional cigar-shaped geometry. Due to a strong Pauli-blocking repulsion among spin-polarized fermions at short distances there cannot be bright fermionic solitons in the case of repulsive boson-fermion interactions. However, we demonstrate that stable bright fermionic solitons can be formed for a sufficiently attractive boson-fermion interaction in a boson-fermion mixture. We also consider the formation of fermionic solitons in the presence of a periodic axial optical-lattice potential. These solitons can be formed and studied in the laboratory with present technology.

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