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Bright solitons and soliton trains in a fermion-fermion mixture

Sadhan K. Adhikari
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Abstract

We use a time-dependent dynamical mean-field-hydrodynamic model to predict and study bright solitons in a degenerate fermion-fermion mixture in a quasi-one-dimensional cigar-shaped geometry using variational and numerical methods. Due to a strong Pauli-blocking repulsion among identical spin-polarized fermions at short distances there cannot be bright solitons for repulsive interspecies fermion-fermion interactions. However, stable bright solitons can be formed for a sufficiently attractive interspecies interaction. We perform a numerical stability analysis of these solitons and also demonstrate the formation of soliton trains. These fermionic solitons can be formed and studied in laboratory with present technology.

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Sadhan K. Adhikari. 2007-02-07. Bright solitons and soliton trains in a fermion-fermion mixture. https://doi.org/10.1140/epjd%2Fe2006-00203-3

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