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arXiv 1902.05475math.APmath.DG
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三维次拉普拉斯算子的点相互作用

Point interactions for 3D sub-Laplacians

Riccardo Adami, Ugo Boscain, Valentina Franceschi, Dario Prandi

摘要:

在本文中,我们证明了,对于一个次拉普拉斯$Δ$上的$3$维流形$M$,没有点相互作用中心在一个点$q_0\in M$存在。当$M$完成w.r.t.关联的子黎曼结构,这意味着作用于$C^\infty_0(M\setminus\{q_0\})$的$Δ$本质上是自伴的。一个特别的例子是海森堡群上的标准次拉普拉斯算子。这与黎曼流形$N$中发生的情况形成鲜明对比,其相关的Laplace-Beltrami算子在$C^\infty_0(N\setminus\{q_0\})$上从来不是本质自伴的,如果$\dim N\le 3$。然后,我们将这一结果应用于薄分子的薛定谔演化,即,转动惯量为零,绕质心旋转

英文摘要:

In this paper we show that, for a sub-Laplacian $Δ$ on a $3$-dimensional manifold $M$, no point interaction centered at a point $q_0\in M$ exists. When $M$ is complete w.r.t. the associated sub-Riemannian structure, this means that $Δ$ acting on $C^\infty_0(M\setminus\{q_0\})$ is essentially self-adjoint. A particular example is the standard sub-Laplacian on the Heisenberg group. This is in stark contrast with what happens in a Riemannian manifold $N$, whose associated Laplace-Beltrami operator is never essentially self-adjoint on $C^\infty_0(N\setminus\{q_0\})$, if $\dim N\le 3$. We then apply this result to the Schrödinger evolution of a thin molecule, i.e., with a vanishing moment of inertia, rotating around its center of mass.

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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