title: Multiple soliton bound states and symmetry breaking in quadratic media.
abstract: We present a study of the dynamics of multiple soliton bound states in diffractive media with second-order nonlinearity. A numerical stability analysis of these bound states reveals that wave propagation in quadratic materials exhibits spatial symmetry-breaking instabilities.
authors.forename: M
authors.initials: M
authors.lastname: Haelterman
authors.forename: S
authors.initials: S
authors.lastname: Trillo
authors.forename: P
authors.initials: P
authors.lastname: Ferro