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arXiv 2010.01552math-phmath.MPmath.PRmath.SP
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无数运算符及其Lifshitz尾

The umpteen operator and its Lifshitz tails

Ohad N. Feldheim, Sasha Sodin

摘要:

正如Kerov在20世纪90年代初提出并在随后的著作中阐明的那样,维格纳随机矩阵的许多性质被某些线性映射所共享,这些线性映射在对称群的表示论中发挥着重要作用。我们介绍和研究的代表性理论的起源,它承担一些类似的离散随机薛定谔算子作用于$d$维晶格的运营商。特别是,我们定义了它的积分态密度,并证明在尺寸$d \geq 2$它拥有类似于安德森模型的Lifshitz尾巴。该结构与19世纪流行的滑动拼图15拼图的无限板版本密切相关。我们使用新的Peierls参数估计谜题在$n$随机移动后返回其初始状态的概率。Lifshitz尾推导出使用识别我们的随机算子与行动的邻接矩阵的难题上的一个随机选择的表示的无限对称群。

英文摘要:

As put forth by Kerov in the early 1990s and elucidated in subsequent works, numerous properties of Wigner random matrices are shared by certain linear maps playing an important rôle in the representation theory of the symmetric group. We introduce and study an operator of representation-theoretic origin which bears some similarity to discrete random Schrödinger operators acting on the $d$-dimensional lattice. In particular, we define its integrated density of states and prove that in dimension $d \geq 2$ it boasts Lifshitz tails similar to those of the Anderson model. The construction is closely related to an infinite-board version of the fifteen puzzle, a popular sliding puzzle from the XIX-th century. We estimate, using a new Peierls argument, the probability that the puzzle returns to its initial state after $n$ random moves. The Lifshitz tail is deduced using an identification of our random operator with the action of the adjacency matrix of the puzzle on a randomly chosen representation of the infinite symmetric group.

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