کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1861701 1037536 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of quantum interference and asymmetries in the operation of quantum pumps
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
The role of quantum interference and asymmetries in the operation of quantum pumps
چکیده انگلیسی
Quantum pumping is a means of generating current in mesoscopic circuits without a bias field. We show that within a common quantum theoretical description, the phenomenon of quantum pumping encompasses fundamentally different processes. Some of them can be explained with classical physics, but others rely on quantum interference for operation. We identify and explain their quantum versus classical origins. For a class of quantum pumps we derive exact analytical expressions for the pumped current that applies at arbitrary operation frequency from adiabatic to non-adiabatic. We show that the pumped current often contains a hidden, and even dominant, antisymmetric component that does not contribute to net transfer in a period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 374, Issue 3, 4 January 2010, Pages 485-490
نویسندگان
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