کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1543990 1512877 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectral and transport properties of the PT-symmetric dimer model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Spectral and transport properties of the PT-symmetric dimer model
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 72, August 2015, Pages 7–16
نویسندگان
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