title: Bright solitons in nonlinear media with a self-defocusing double-well nonlinearity.
abstract: We show that stable bright solitons can appear in a medium with spatially inhomogeneous self-defocusing (SDF) nonlinearity of a double-well structure. For a specific choice of the nonlinearity parameters, we obtain exact analytical solutions for the fundamental bright solitons. By making use of the linear stability analysis, the stability region in the parameter space for the exact fundamental bright soliton is obtained numerically. We also show the bifurcation from an antisymmetric to an asymmetric bright soliton for the SDF double-well nonlinearity.
authors.affiliation: College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China and Department of Physics, Hunan Normal University, Changsha 410081, China.
authors.forename: Qiongtao
authors.initials: Q
authors.lastname: Xie
authors.affiliation: College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China.
authors.forename: Linmao
authors.initials: L
authors.lastname: Wang
authors.affiliation: College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China.
authors.forename: Yizhen
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China.
authors.forename: Zhenjiang
authors.initials: Z
authors.lastname: Shen
authors.affiliation: College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Fu