title: Quadratic solitons as nonlocal solitons.
abstract: We show that quadratic solitons are equivalent to solitons of a nonlocal Kerr medium. This provides new physical insight into the properties of quadratic solitons, often believed to be equivalent to solitons of an effective saturable Kerr medium. The nonlocal analogy also allows for analytical solutions and the prediction of bound states of quadratic solitons.
authors.affiliation: Informatics and Mathematical Modelling, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
authors.forename: Nikola I
authors.initials: NI
authors.lastname: Nikolov
authors.forename: Dragomir
authors.initials: D
authors.lastname: Neshev
authors.forename: Ole
authors.initials: O
authors.lastname: Bang
authors.forename: Wiesław Z
authors.initials: WZ
authors.lastname: Królikowski