Rotationally invariant isospinning baby-skyrmions dressed by fermions

Marco Barsanti, Gianni Tallarita

Research output: Contribution to journalArticlepeer-review


We couple Fermions to the isospinning (2+1) baby-skyrme model. We show that consistent rotationally invariant localised solutions can be found but the Fermionic solutions to the equations of motion are not in general eigenstates of the Hamiltonian. These do however become full eigenstates in a particular limit. We also find the corresponding Fermionic eigenstates of the Hamiltonian, for which our Fermion ansatz is also well suited. For localised Fermionic states, a novel constraint on the internal isospin frequency exists. Throughout our studies, we include the backreaction of the Fermions on the baby-skyrmion.

Original languageEnglish
Article number76
JournalJournal of High Energy Physics
Issue number6
StatePublished - Jun 2023
Externally publishedYes


  • Field Theories in Lower Dimensions
  • Integrable Field Theories
  • Nonperturbative Effects


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