期刊
PHYSICS LETTERS A
卷 378, 期 30-31, 页码 2024-2028出版社
ELSEVIER
DOI: 10.1016/j.physleta.2014.05.005
关键词
Non-Hermitian Hamiltonian; PT symmetric optical system
PT symmetric Aubry-Andre model describes an array of N coupled optical waveguides with position-dependent gain and loss. We show that the reality of the spectrum depends sensitively on the degree of quasi-periodicity for small number of lattice sites. We obtain the Hofstadter butterfly spectrum and discuss the existence of the phase transition from extended to localized states. We show that rapidly changing periodical gain/loss materials almost conserve the total intensity. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据