Multiple existence of sign changing solutions for coupled nonlinear Schrödinger equations

In this paper, we consider the multiple existence of sign changing solutions of coupled nonlinear Schrödinger equations equation(P){−Δu+μ1u=λ1u3+βv2uin R3−Δv+μ2v=λ2v3+βu2vin R3 where μ1,μ2,λ1,λ2μ1,μ2,λ1,λ2 are positive and β<0β<0.