Soliton solutions and periodic solutions for two models arises in mathematical physics

Abstract: We aimed in this paper to acquire the periodic wave solutions and soliton solutions and other solutions such as kink-wave solutions for the cubic nonlinear Schrödinger equation with repulsive delta potential (δ-NLSE) and complex coupled Higgs field equation via two mathematical methods Jacobi elliptic function method and generalized Kudryashov method. Some of these solutions are degenerated to solitary wave solutions and periodic wave solutions in the limit case. We also gave the meaning of these solutions physically and the numerical simulation by some figures.

We implemented the Jacobi elliptic function method [27][28][29] and generalized Kudryashov's method to obtain the Jacobi elliptic function solutions, periodic solutions and soliton solutions for the (δ-NLSE) and complex coupled Higgs field.
Some exact solutions are based on the generalized Hirota bilinear [30] method. We introduce a brief summary for the two methods which have been applied Jacobi elliptic function method and generalized Kudryashov's method in Section 2. Jacobi elliptic function, periodic solutions and soliton solutions for the cubic nonlinear Shrödinger's equation with repulsive delta potential (δ-NLSE) and complex coupled Higgs field equation using two methods were derived analytically and numerically in Sections 3 and 4. We explained the results in a view of physical perspective in Section 5. Finally, some results were deduced in Section 6.

Materials and methods
Suppose that we have a given nonlinear partial differential equations (NPDEs) as follows For m = 2 such that u 1 = u, u 2 = v, and n = 2 such as x 1 = t, x 2 = x, Step 1. By using a wave transformation u( n is the wave speed and the function. Transformed Eq (2.1) into an ordinary differential equation (ODE) where ζ = lx − nt + d.
Step 2. Suppose the solutions is as follows where N, and M determined by balancing the highest order derivatives with the nonlinear term, the parameters a i and b i to be determined.

The Jacobi elliptic function method
The variable ϕ(ζ) is the solutions of the anzata [31]  Inserting the solutions of Eq (2.4) and setting ζ = lx ± nt + f , then we obtain the exact traveling wave solutions of Eq (2.2).

The generalized Kudryashov's method
For m = 1, we suppose the solutions of Eq (2.1) can be expressed in the following rational form [32] where N, and M determined by balancing the highest order derivatives with the nonlinear term, the parameters a i and b i to be determined. The variable ϕ(ζ) is the solutions which satisfy the first order Bernoulli differential equation which has the solution ϕ(ζ) = 1 1 + c 1 e lx−nt+ f . (2.10) Inserting the solutions of Eq (2.9) into Eqs (2.8) and (2.1), then we obtain the exact traveling wave solutions such as soliton solutions of Eq (2.1).

Jacobi elliptic function method
Consider the δ-NLSE equation [33] iu tt + 1 2 Where α, υ 0 are real constants, δ is the Dirac measure [34]. The δ potential is called repulsive for α > 0 and attractive for α < 0. The δ-NLSE equation is a simpler model which describes the resonant nonlinear propagation of light through optical waves [34].
To find the Jacobi elliptic solutions for δ-NLSE equation via Jacobi elliptic function method, we start by assuming a solution of the form [35] u (x, t) = U(ζ)e i(kx+ω t) . (

3.2)
Where ζ = lx − n t + f , l, n represent the wave number and wave frequency of the light pulse, respectively, and U(ζ) is the cnoidal wave or periodic wave or solitary wave solutions.
We transform the (3.1) into ODE wave transformation using (3.2) Balancing U with U 3 , we get N = 1. Then, the Jacobi elliptic function solutions for Eq (3.1) as follows: where a i , i = 0, 1 are constants which are to be determined later and ϕ satisfies (2.4) which has the solutions in Table 1.2 in [36]. Inserting (3.4) along (2.4) into (3.3) and collecting the terms with the same order of ϕ(ζ), and setting it to zero we obtain the Jacobi elliptic function solutions for δ-NLSE equation where When m −→ 1, we obtain the soliton solutions for δ-NLSE equation where k = n l . When m −→ 0, we obtain the periodic solutions for δ-NLSE equation When m −→ 1, we obtain the soliton solutions for δ-NLSE equation When m −→ 0, we obtain the periodic solutions for δ-NLSE equation When m −→ 1, we obtain the soliton solutions for δ-NLSE equation (3.12)

Generalized Kudryashov's method
In this section we will find the soliton solutions for δ-NLSE equation via generalized Kudryashov's method.
Suppose the solution for Eq (3.1) in the rational form (2.8). Balancing U with U 3 , in (3.3) we get N = M + 1, we choose N = 2, M = 1 Then, we can obtain the soliton solutions for Eq (3.1) according to (2.8) as follows: where a i , b j , i = 0, 1, 2, j = 0, 1 are constants to be determined and ϕ satisfies (2.9) which has the solutions (2.10). Inserting (3.13) along (2.9) into (3.3) and collecting the terms with the same order of ϕ(ζ), we obtain the family of soliton solutions for δ-NLSE equation as follows: 14) u(x, t) = − a 2 e 2 lx−2 nt+2 f c 1 where k = n l .

Physical discussions
In this section, we give the physical meanings of the solutions obtained for δ-NLSE equation (3.1), for (3.5), (3.7) and (3.10) which are Jacobi elliptic pattern solutions, which are the solutions in terms of the Jacobi elliptic functions or cnoidal solutions.
It is interesting to point out that the delicate balance between the nonlinearity effect of |u| 2 u and the dissipative effect of u xx gives rise to solitons, that after full interaction with others, the solitons come back retaining their identities with the same speed and shape. The δ-NLSE equation (3.1) has solitary wave solutions that have exponentially decaying wings. If two solitons of the δ-NLSE equation (3.1) collide, the solitons just pass through each other and emerge unchanged.
We showed the time growth of these Jacobi elliptic solutions by some figures to describe the dynamical properties in 3D graphs and 2D graphs in Figure 1. The solutions (3.8) and (3.11), which are periodic solutions, displayed in 3D graphs and 2D graphs in Figure 2. The solution (3.9), which is kink-soliton solution which has a permanent profile displayed in 2D graph and 3D graph, solutions in (3.12) and (3.14)-(3.19), which soliton-like solutions which is occurred from the balance between nonlinearity U 3 and dispersion U , displayed in Figure 3. All figures in 2D for the space evolution −10 < x < 10 and figures in 3D for the time evolution 0 < t < 5 for Jacobi elliptic function, kink-soliton solutions and soliton-like, space evolution for periodic solutions in the interval −5 < x < 5 and −20 < x < 20.

Jacobi elliptic function method
Consider the complex coupled Higgs field equation [37] describes a system of conserved scalar nucleons interacting with neutral scalar mesons, where v is a complex scalar nucleon field and u is a real scalar meson field [38]. In case of α < 0, β < 0, the Eq (4.1) transformed into nonlinear Klein-Gordon equation and for α > 0, β > 0, the Eq (4.1) transformed into coupled Higgs field equation.
To find the Jacobi elliptic solutions for complex coupled Higgs field equation via Jacobi elliptic function method, we start by assuming a solution of the form [35] u Where ζ = lx − n t + f , l, n represent the wave number and wave frequency of the light pulse, respectively, and U(ζ) and V(ζ) are the periodic wave profile.
We transform the (4.1) into ODE wave transformation using (4.2) Balancing U with U 3 , we get N = 2. Then, the Jacobi elliptic function solutions for Eq (4.1) as follows: where a i , i = 0, 1 are constants which are to be determined later and ϕ satisfies (2.4). Inserting (4.4) along (2.4) into (4.3) and collecting the terms with the same order of ϕ(ζ), and setting it to zero we obtain the Jacobi elliptic function solutions for complex coupled Higgs field equation for where k = − nω l .
When m −→ 1, we obtain the soliton solutions for complex coupled Higgs field equation When m −→ 1, we obtain the soliton solutions for complex coupled Higgs field equation And When m −→ 1, we obtain the soliton solutions for complex coupled Higgs field equation (4.10)

Generalized Kudryashov's method
In this section we will find the soliton solutions for complex coupled Higgs field equation using generalized Kudryashov's method.
Let us assume the solution for Eq (4.1) in the rational form (2.8). Balancing U with U 3 , in (3.3) we get N = M + 1, we choose N = 2, M = 1 Then, we can obtain the soliton solutions for Eq (4.1) according to (2.8) as follows: for

Physical interpretation
In this section, we will display numerical simulations to the problem of this paper that add extra flavor to our analytical solutions of Eq (4.1), the physical meanings of the solutions obtained for complex coupled Higgs field equation (4.1), for (4.5), (4.7) and (4.9) which are Jacobi elliptic pattern solutions, which are cnoidal solutions, we showed the time growth of these Jacobi elliptic solutions by some figures to describe the dynamical properties in 3D graphs and 2D graphs in Figures 4-6. The solutions (4.6), which is soliton-solutions, (4.8) and (4.10), which is kink-soliton solutions which have a permanent profile displayed in 2D graph and 3D graph by taking suitable values of the parameters to visualize the mechanism of the (4.1) in Figures 7-10., solutions in (4.12), which are soliton-like solutions from balance between nonlinearity U 3 and dispersion U , displayed in Figure 6. All figures in 2D for the space evolution −10 < x < 10 and figures in 3D for the time evolution 0 < t < 5 for Jacobi elliptic function, kink-soliton solutions and soliton-like, space evolution for periodic solutions in the interval −5 < x < 5 and −20 < x < 20.       Remark: The solutions (4.5)-(4.10) and (4.12) for complex coupled Higgs field equation (4.1) are not previously found, that is some of them were explored before and in this paper we gave new solutions, in [39], which is used an algebraic method is applied to construct solitary wave solutions and Jacobi periodic wave solutions, the authors in [40] constructed the traveling wave solutions using (G' /G)-expansion method and the authors in [37] constructed the soliton solutions and triangular solutions using tanh method.

Conclusions
In this paper we successfully constructed the Jacobi elliptic function solutions, periodic wave solutions and soliton solutions, which obtained as a limit of the periodic wave solutions for δ-NLSE equation (3.1) and complex coupled Higgs field equation (4.1) using the Jacobi elliptic function method and generalized Kudryashov method utilized in treating the equations with the aid of symbolic computation using Mathematica. Other soltions are constructed such as kink-soliton solutions. We investigate these results numerically by some figures. As such, we compared the obtained results with previously works to prove that we explored some results and new results were derived and evaluated computationally owing to the less constant parameters. These solutions with free parameters have rich structures and may be important to explain some physical phenomena. It is worthy to note that the two methods are straightforward, concise and can be widely used to other nonlinear partial differential equations which arise in the theory of solitons in mathematical physics.