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arXiv math-ph/0101020math-phmath.APmath.MP
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Schrödinger-Poisson系统平衡态的存在性和非线性稳定性

Existence and nonlinear stability of steady states of the Schrödinger-Poisson system

Peter A. Markowich, Gerhard Rein, Gershon Wolansky

摘要:

我们考虑吸引(等离子体物理)库仑情形下的薛定谔-泊松系统.给定一个定态,我们证明了它的非线性稳定性,使用适当定义的能量Casimir功能作为李雅普诺夫函数。为了得到这样的稳态,我们从一个给定的Casimir泛函,并构造一个新的功能,这是在某种意义上对偶的相应的能量-Casimir泛函。这个对偶泛函有一个唯一的极大化子,它是薛定谔-泊松系统的一个定态,并且位于稳定类中。稳态由状态方程参数化,给出量子态的占据概率作为其能级的严格递减函数。

英文摘要:

We consider the Schrödinger-Poisson system in the attractive (plasma physics) Coulomb case. Given a steady state from a certain class we prove its nonlinear stability, using an appropriately defined energy-Casimir functional as Lyapunov function. To obtain such steady states we start with a given Casimir functional and construct a new functional which is in some sense dual to the corresponding energy-Casimir functional. This dual functional has a unique maximizer which is a steady state of the Schrödinger-Poisson system and lies in the stability class. The steady states are parametrized by the equation of state, giving the occupation probabilities of the quantum states as a strictly decreasing function of their energy levels.

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