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arXiv 0907.4466math-phmath.MP
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非正性条件下含时Gross-Pitaevskii方程的推导

Derivation of the time dependent Gross-Pitaevskii equation without positivity condition on the interaction

Peter Pickl

摘要:

利用一种新的方法,可以从相互作用粒子的微观$N$体薛定谔演化中导出平均场方程,而不需要使用BBGKY族。在本文中,我们希望分析缩放导致的Gross-Pitaevskii方程,这通常是假设相互作用的积极性。文[6]中提出的处理平均场极限的新方法使我们可以放宽这个条件。然而,我们必须为这种弛豫付出的代价是,我们必须将标度行为限制在$β<1/3$,并且我们必须假设初始波函数$μ^{Ψ_0}$的约化的单粒子边缘密度矩阵快速收敛到纯态$|ϕ_0><ϕ_0|$。

英文摘要:

Using a new method it is possible to derive mean field equations from the microscopic $N$ body Schrödinger evolution of interacting particles without using BBGKY hierarchies. In this paper we wish to analyze scalings which lead to the Gross-Pitaevskii equation which is usually derived assuming positivity of the interaction. The new method for dealing with mean field limits presented in [6] allows us to relax this condition. The price we have to pay for this relaxation is however that we have to restrict the scaling behavior to $β<1/3$ and that we have to assume fast convergence of the reduced one particle marginal density matrix of the initial wave function $μ^{Ψ_0}$ to a pure state $|ϕ_0><ϕ_0|$.

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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