Spectral and transport properties of the PT-symmetric dimer model

被引：8

作者：

Vazquez-Candanedo, O. ^{[1
]}

Izrailev, F. M. ^{[1
,2
,3
]}

Christodoulides, D. N. ^{[4
]}

机构：

[1] Univ Autonoma Puebla, Inst Fis, Puebla 72570, Mexico

[2] Michigan State Univ, NSCL, E Lansing, MI 48824 USA

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Univ Cent Florida, Coll Opt & Photon CREOL, Orlando, FL 32816 USA

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2015年 / 72卷

关键词：

PT-symmetry; Scattering; Dimers; PARITY-TIME SYMMETRY; TRANSMISSION; REFLECTION;

D O I：

10.1016/j.physe.2015.04.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study the scattering properties of the PT-symmetric tight-binding model with balanced gain and loss parameters. Our main interest is to establish the link between the spectral properties of scattering states and transport characteristics for the case of non-equal couplings between gain/loss sites. The analytical approach we have used allows one to reveal a quite unexpected role of this set-up in comparison with that of equal couplings. In particular, we demonstrate that for the exceptional points characterized by equal eigenvalues of the transfer matrix, the transmission coefficient can be different from one in contrast with the model with equal couplings. The analytical results are complemented by the numerical data. (C) 2015 Elsevier B.V. All rights reserved

引用

页码：7 / 16

页数：10

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