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arXiv quant-ph/0409199quant-ph
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简单模型系统中非线性薛定谔方程的束缚态和共振态

Bound and resonance states of the nonlinear Schroedinger equation in simple model systems

D. Witthaut, S. Mossmann, H. J. Korsch

摘要:

研究了单δ势和δ壳势情形下的定常非线性Schroedinger方程或Gross-Pitaevskii方程。这些模型系统允许解析解,从而提供了有用的洞察到的非线性薛定谔方程的静态绑定,散射和共振态的功能。对于单δ势,研究了势强度和非线性的影响以及从束缚态到散射态的跃迁。进一步讨论了排斥性δ壳层势的共振态的性质。

英文摘要:

The stationary nonlinear Schroedinger equation, or Gross-Pitaevskii equation, is studied for the cases of a single delta potential and a delta-shell potential. These model systems allow analytical solutions, and thus provide useful insight into the features of stationary bound, scattering and resonance states of the nonlinear Schroedinger equation. For the single delta potential, the influence of the potential strength and the nonlinearity is studied as well as the transition from bound to scattering states. Furthermore, the properties of resonance states for a repulsive delta-shell potential are discussed.

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