title: Upper threshold for stability of multipole-mode solitons in nonlocal nonlinear media.
abstract: We address the stability of multipole-mode solitons in nonlocal Kerr-type nonlinear media. Such solitons comprise several out-of-phase peaks packed together by the forces acting between them. We discover that dipole-, triple-, and quadrupole-mode solitons can be made stable, whereas all higher-order soliton bound states are unstable.
authors.affiliation: ICFO-Institut de Ciencies Fotoniques and Universitat Politecnica de Catalunya, Barcelona, Spain. xu.zhiyong@icfo.es
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Xu
authors.forename: Yaroslav V
authors.initials: YV
authors.lastname: Kartashov
authors.forename: Lluis
authors.initials: L
authors.lastname: Torner