Dark-Bright Solitons in a Superfluid Bose-Fermi Mixture

Abstract

The recent experimental realization of Bose-Fermi superfluid mixtures of dilute ultracold atomic gases has opened new perspectives in the study of quantum many-body systems. Depending on the values of the scattering lengths and the amount of bosons and fermions, a uniform Bose-Fermi mixture is predicted to exhibit a fully mixed phase, a fully separated phase or, in addition, a purely fermionic phase coexisting with a mixed phase. The occurrence of this intermediate configuration has interesting consequences when the system is nonuniform. In this work we theoretically investigate the case of solitonic solutions of coupled Bogoliubov-de Gennes and Gross-Pitaevskii equations for the fermionic and bosonic components, respectively. We show that, in the partially separated phase, a dark soliton in Fermi superfluid is accompanied by a broad bosonic component in the soliton, forming a dark-bright soliton which keeps full spatial coherence.

7 pages, 4 figures

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• Correlated quantum dynamics of two quenched fermionic impurities immersed in a Bose-Einstein Condensate
• All-optical production of a superfluid Bose-Fermi mixture of ${}^6$Li and ${}^7$Li
• Static and dynamic properties of heavily doped quantum vortices
• Vortex Lattices in the Bose-Fermi Superfluid Mixture
• Tan's contact and the phase distribution of repulsive Fermi gases: Insights from QCD noise analyses
• Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions
• Collective dynamics of Fermi-Bose mixtures with an oscillating scattering length
• Weak-coupling to unitarity crossover in Bose-Fermi mixtures: Mixing-demixing and spontaneous symmetry breaking in trapped systems
• Polarizing the Medium: Fermion-Mediated Interactions between Bosons
• Detecting Entrainment in Fermi-Bose Mixtures
• Dynamical Critical Behavior of an Attractive Bose-Einstein Condensate Phase Transition
• Vortex-core structure in a mixture of Bose and Fermi superfluids
• Rotational properties of superfluid Fermi-Bose mixtures in a tight toroidal trap
• Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
• Exploring phonon-like interactions in one-dimensional Bose-Fermi mixtures
• Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses