Black soliton in a quasi-one-dimensional trapped fermion-fermion mixture

Details Black soliton in a quasi-one-dimensional trapped fermion-fermion mixture Black soliton in a quasi-one-dimensional trapped fermion-fermion mixture

2006-07-06

arxiv.org/abs/cond-mat/0607169v1

Laser Phys. Lett. 3 (2006) 605-611

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 10 figures

Scientific paper

Employing a time-dependent mean-field-hydrodynamic model we study the generation of black solitons in a degenerate fermion-fermion mixture in a cigar-shaped geometry using variational and numerical solutions. The black soliton is found to be the first stationary vibrational excitation of the system and is considered to be a nonlinear continuation of the vibrational excitation of the harmonic oscillator state. We illustrate the stationary nature of the black soliton, by studying different perturbations on it after its formation.

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