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arXiv math-ph/0203046math-phmath.MP
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无质量Nelson模型的有效N体动力学和无谱隙绝热解耦

Effective N-body dynamics for the massless Nelson model and adiabatic decoupling without spectral gap

Stefan Teufel

摘要:

从具有紫外截止的无质量Nelson模型出发,导出了N粒子通过有效对势相互作用的薛定谔方程。我们考虑一个尺度极限,其中粒子是慢的和重的,但是,与早期的工作[6]相反,没有“弱耦合”被假设。为此,我们证明了一个空间绝热定理没有间隙条件,特别是,控制收敛速度的绝热极限。

英文摘要:

The Schroedinger equation for N particles interacting through effective pair potentials is derived from the massless Nelson model with ultraviolet cutoffs. We consider a scaling limit where the particles are slow and heavy, but, in contrast to earlier work [6], no ``weak coupling'' is assumed. To this end we prove a space-adiabatic theorem without gap condition which gives, in particular, control on the rate of convergence in the adiabatic limit.

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