arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.01192math-phmath.MP
收藏

Hartree动力学在Sobolev迹范数下收敛的一个简单证明

A simple proof of convergence to the Hartree dynamics in Sobolev trace norms

Ioannis Anapolitanos, Michael Hott

摘要:

在过去的几年里,从平均场极限下的玻色子多体系统导出Hartree方程已经得到了非常深入的研究。然而,很少有结果表明收敛的第k个边际的N体密度矩阵的投影到k倍张量积的解决方案的哈特里方程在更强的跟踪规范,如能量跟踪规范,见\cite{MS},\cite{Lu}。这个问题从物理学的角度来看是非常重要的。其原因是,然后可以近似的期望值的某些可观的N体系统的哈特里方程的装置,与放松的非常严格的假设,可观的是有界的运营商。这里我们考虑非相对论的情况。我们证明了,仅假设初始数据的H^1-正则性,收敛于能量迹范数没有率,和收敛于任何其他较弱的Sobolev迹范数的速率。我们的证明是简单的,并使用功能的$a_N$介绍Pickl在\cite{Pi}。

英文摘要:

The derivation of the Hartree equation from many-body systems of Bosons in the mean field limit has been very intensively studied in the last couple of years. However, very few results exist showing convergence of the k-th marginal of the N-body density matrix to the projection to the k-fold tensor product of the solution of the Hartree equation in stronger trace norms like the energy trace norm, see \cite{MS}, \cite{Lu}. This issue is from a physical view point very important. The reason is that one can then approximate expectation values of certain observables of the N-body system by means of the Hartree equation, with relaxation of the very restrictive assumption that the observables are bounded operators. Here we consider the non-relativistic case. We prove, assuming only H^1-regularity of the initial data, convergence in the energy trace norm without rates, and convergence in any other weaker Sobolev trace norm with rates. Our proof is simple and uses the functional $a_N$ introduced by Pickl in \cite{Pi}.

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。

↑