کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7934060 1512875 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics of a quantum wave emitted by a decaying and evanescent point source
ترجمه فارسی عنوان
دینامیک یک موج کوانتوم منتشر شده از یک منبع نقطه تخریب و خالی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
We put forward a model that describes a decaying and evanescent point source of non-interacting quantum waves in 1D. This point-source assumption allows for a simple description that captures the essential aspects of the dynamics of a wave traveling through a classically forbidden region without the need to specify the details of the inner region. The dynamics of the resulting wave is examined and several characteristic times are identified. One of them generalizes the tunneling time-scale introduced by Büttiker and Landauer and it characterizes the arrival of the maximum of the wave function. Diffraction in time and deviations from exponential decay are also studied. Here we show that there exists an optimal injection frequency and detection point for the observation of these two quantum phenomena.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 74, November 2015, Pages 108-114
نویسندگان
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