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Improved numerical approach for the time-independent Gross-Pitaevskii nonlinear Schrödinger equation
A Gammal1, T Frederico, L Tomio
1Instituto de Física Teórica, Universidade Estadual Paulista, 01405-900 São Paulo, Brazil.
Abstract:
In the present work, we improve a numerical method, developed to solve the Gross-Pitaevkii nonlinear Schrödinger equation. A particular scaling is used in the equation, which permits us to evaluate the wave-function normalization after the numerical solution. We have a two-point boundary value problem, where the second point is taken at infinity. The differential equation is solved using the shooting method and Runge-Kutta integration method, requiring that the asymptotic constants, for the function and its derivative, be equal for large distances. In order to obtain fast convergence, the secant method is used.
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