On Schrödinger-Poisson Systems

We discuss some recent results dealing with the existence of bound states of the nonlinear Schr?dinger-Poisson system

Multiple positive solutions for a quasilinear system of Schrödinger equations

We consider the quasilinear system

Existence and stability results for the planar Schrödinger-Poisson system

In this paper, we obtain existence and orbital stability results for the planar Schrödinger-Poisson system. Our results are based on the Gagliardo-Nirenberg inequality, the concentration-compactness principle, and the extremum principle in critical point theory.     

Ground state solitary waves for the planar Schrödinger-Poisson system

In this paper, we investigate the planar Schrödinger–Poisson System. Based on fixed point argument, Riesz’s rearrangement, Hardy–Littlewood–Sobolev inequality and critical point theory, we prove the existence and symmetry properties of ground state solitary waves. In addition to their existence, we also obtain the orbital stability of solitary waves.     

Multiple soliton solutions for a quasilinear Schrödinger equation

Using Morse theory, truncation arguments and an abstract critical point theorem, we obtain the existence of at least three or infinitely many nontrivial solutions for the following quasilinear Schrödinger equation in a bounded smooth domain

$$\left\{ {\begin{array}{*{20}{c}} { - {\Delta _p}u - \frac{p}{{{2^{p - 1}}}}u{\Delta _p}\left( {{u^2}} \right) = f\left( {x,u} \right)\;in\;\Omega } \\ {u = 0\;on\;\partial \Omega .} \end{array}} \right.$$

(0.1)

Our main results can be viewed as a partial extension of the results of Zhang et al. in [28] and Zhou and Wu in [29] concerning the the existence of solutions to (0.1) in the case of p = 2 and a recent result of Liu and Zhao in [21] two solutions are obtained for problem 0.1.

     

On a quasilinear parabolic–elliptic chemotaxis system with logistic source

This paper deals with a quasilinear parabolic–elliptic chemotaxis system with logistic source, under homogeneous Neumann boundary conditions in a smooth bounded domain. For the case of positive diffusion function, it is shown that the corresponding initial boundary value problem possesses a unique global classical solution which is uniformly bounded. Moreover, if the diffusion function is zero at some point, or a positive diffusion function and the logistic damping effect is rather mild, we proved that the weak solutions are global existence. Finally, it is asserted that the solutions approach constant equilibria in the large time for a specific case of the logistic source.     

On the globality of a solution of one system of Schrödinger equations

A system of nonlinear Schrödinger equations $\begin{gathered} \frac{{\partial u_k }}{{\partial t}} = ia_k \Delta u_k + f_k (u,u^* ), t > 0, k = 1,...,m, \hfill \\ u_k (0,x) = u_{k0} (x), k = 1,...,m, x \in R^n . \hfill \\ \end{gathered} $ is investigated. Conditions that assure the globality of a solution are found.     

Stable standing waves for a class of nonlinear Schrödinger-Poisson equations

We prove the existence of orbitally stable standing waves with prescribed L ²-norm for the following Schrödinger-Poisson type equation

$i\psi_{t}+ \Delta \psi - (|x|^{-1}*|\psi|^{2}) \psi+|\psi|^{p-2}\psi=0 \quad \rm{in} \quad \mathbb R^{3},$

when \({p\in \left\{ \frac{8}{3}\right\}\cup (3,\frac{10}{3})}\). In the case \({3 < p < \frac{10}{3}}\), we prove the existence and stability only for sufficiently large L ²-norm. In case \({p=\frac{8}{3}}\), our approach recovers the result of Sanchez and Soler (J Stat Phys 114:179–204, 2004) for sufficiently small charges. The main point is the analysis of the compactness of minimizing sequences for the related constrained minimization problem. In the final section, a further application to the Schrödinger equation involving the biharmonic operator is given.

     

Nontrivial solutions for the fractional Schrödinger-Poisson system with subcritical or critical nonlinearities

In this paper, we are concerned with a class of fractional Schrödinger-Poisson system involving subcritical or critical nonlinearities. By using the Nehari manifold and variational methods, we obtain the existence and multiplicity of nontrivial solutions.     

On a class of nonlinear Schrödinger equations

This paper concerns the existence of standing wave solutions of nonlinear Schrödinger equations. Making a standing wave ansatz reduces the problem to that of studying the semilinear elliptic equation:

On energy stability for the coupled nonlinear Schrödinger system

In this short note, we prove that smooth solutions to the coupled nonlinear Schr?dinger system with coercive polynomial nonlinearities are unique among distributional solutions enjoying the energy inequality. The argument also yields the stability of classical solutions in the energy norm. The research is partially supported by the National Natural Science Foundation of China 10631020 and SRFDP 20060003002     

Bound states for a coupled Schrödinger system

We consider the existence of bound states for the coupled elliptic system