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arXiv 0806.3516math-phmath.MP
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非线性基态的本征值

Eigenvalues of a nonlinear ground state in the Thomas-Fermi approximation

Clément Gallo, Dmitry Pelinovsky

摘要:

我们研究了一个非线性的基态的Gross-Pitaevskii方程的抛物型潜在的流体力学极限通常被称为托马斯-费米近似。存在的能量极小值已在文献中已知了一段时间,但它只是最近的时候,严格证明了费密近似。Gross-Pitaevskii方程在基态的线性化谱由一个无界的正特征值序列组成。我们分析了特征值在流体力学极限下的收敛性。证明了预解算子的依范数收敛性,并估计了收敛速度。我们还研究了渐近和数值逼近的特征函数和特征值使用艾里函数。

英文摘要:

We study a nonlinear ground state of the Gross-Pitaevskii equation with a parabolic potential in the hydrodynamics limit often referred to as the Thomas--Fermi approximation. Existence of the energy minimizer has been known in literature for some time but it was only recently when the Thomas-Fermi approximation was rigorously justified. The spectrum of linearization of the Gross-Pitaevskii equation at the ground state consists of an unbounded sequence of positive eigenvalues. We analyze convergence of eigenvalues in the hydrodynamics limit. Convergence in norm of the resolvent operator is proved and the convergence rate is estimated. We also study asymptotic and numerical approximations of eigenfunctions and eigenvalues using Airy functions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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