title: Stability of spiralling solitary waves in Hamiltonian systems.
abstract: We present a rigorous criterion for stability of spiralling solitary structures in Hamiltonian systems incorporating the angular momentum integral and demonstrate its applicability to the spiralling of two mutually incoherent optical beams propagating in a photorefractive material.
authors.affiliation: Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom.
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Skryabin
authors.forename: John M
authors.initials: JM
authors.lastname: McSloy
authors.forename: William J
authors.initials: WJ
authors.lastname: Firth