Quantum Diffusion and Eigenfunction Delocalization in a Random Band Matrix Model
Quantum Diffusion and Eigenfunction Delocalization in a Random Band Matrix Model
复制标题
随机带矩阵模型中的量子扩散和本征函数离域
DOI:
10.1007/s00220-011-1204-2
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发表时间:
2010
影响因子:
2.4
通讯作者:
Antti Knowles
中科院分区:
文献类型:
--
作者:
L. Erdős;Antti Knowles
We consider Hermitian and symmetric random band matrices H in d ≥ 1 dimensions. The matrix elements Hxy, indexed by $${x,y \in \Lambda \subset \mathbb{Z}^d}$$, are independent, uniformly distributed random variables if $${\lvert{x-y}\rvert}$$ is less than the band width W, and zero otherwise. We prove that the time evolution of a quantum particle subject to the Hamiltonian H is diffusive on time scales $${t\ll W^{d/3}}$$. We also show that the localization length of the eigenvectors of H is larger than a factor Wd/6 times the band width. All results are uniform in the size $${\lvert{\Lambda}\rvert}$$ of the matrix.
影响因子:
3.1
作者:
Erdos, Laszlo;Schlein, Benjamin;Yau, Horng-Tzer
通讯作者:
Yau, Horng-Tzer