Ring solitons and soliton sacks in imbalanced fermionic systems

Abstract

We show that in superfluids with fermionic imbalance and uniform ground state, there are stable solitons. These solutions are formed of radial density modulations resulting in nodal rings. We demonstrate that these solitons exhibit nontrivial soliton-soliton and soliton-vortex interactions and can form complicated bound states in the form of "soliton sacks". In a phase-modulating (Fulde-Ferrell) background, we find different solitonic states, in the form of stable vortex-antivortex pairs.

arXiv commentVersion published in Physical Review Research

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Cited by in corpus (10)

• Dynamics of spin-polarized impurity in ultracold Fermi gas
• Disordered structures in ultracold spin-imbalanced Fermi gas
• Generation and decay of Higgs mode in a strongly interacting Fermi gas
• Dihedral rings of patterns emerging from a Turing bifurcation
• The absence of superconductivity in the next-to-leading order Ginzburg-Landau functional for Bardeen-Cooper-Schrieffer superconductor
• Ground state fractal crystals
• Vortex lattice in spin-imbalanced unitary Fermi gas
• Finding the stable mechanism of ring solitons in two-dimensional Fermi superfluids
• Local Quantum Cooling for Large Fermi Systems with Pairing
• Quantum vortex dipole as a probe of the normal component distribution