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We study soliton solutions to the Klein-Gordon equation via Lie symmetriesand the travelling-wave ansatz. It is shown, by taking a linear combination ofthe spatial and temporal Lie point symmetries, that soliton solutions naturallyexist, and the resulting field lies in the complex plane. We normalize thefield over a finite spatial interval, and thereafter, specify one of theintegration constants in terms of the other. Solutions to a specific type ofnonlinear Klein-Gordon equation are studied via the sine-cosine method, and areal soliton wave is obtained. Lastly, the multiplier method is used toconstruct conservation laws for this particular nonlinear Klein-Gordon equationin (3 + 1)-dimensions.

Conservation Laws for the Nonlinear Klein-Gordon Equation in (1+1)-, (2+1), and (3+1)-dimensions