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原文連結
論文資訊
- 類型：已發表論文
- 日期：2012-04-24
摘要
We consider the 非線性 Schrodinger equation (NLSE) in 1 + 1 dimension with scalar-scalar self-interaction g(2)/kappa+1(psi(star)psi)(kappa+1) in the presence of the external forcing terms of the form re (i(kx+theta)) - delta psi. We find new exact solutions for this problem and show that the solitary wave momentum is conserved in a moving frame where upsilon(k) = 2k. These new exact solutions reduce to the constant phase solutions of the unforced problem when r -> 0. In particular we study the behavior of solitary wave solutions in the presence of these external forces in a variational approximation which allows the position, momentum, width, and phase of these waves to vary in time. We show that the stationary solutions of the variational equations include a solution close to the exact one a
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