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Author Chuchem, Maya ♦ Cohen, Doron
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-12-09
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Mathematics ♦ Physics
Subject Keyword Quantum Physics ♦ Condensed Matter - Mesoscale and Nanoscale Physics ♦ Mathematical Physics ♦ math ♦ physics:cond-mat ♦ physics:math-ph ♦ physics:quant-ph
Abstract A current can be induced in a closed device by changing control parameters. The amount $Q$ of particles that are transported via a path of motion, is characterized by its expectation value $<Q>$, and by its variance $Var(Q)$. We show that quantum mechanics invalidates some common conceptions about this statistics. We first consider the process of a double path crossing, which is the prototype example for counting statistics in multiple path non-trivial geometry. We find out that contrary to the common expectation, this process does not lead to partition noise. Then we analyze a full stirring cycle that consists of a sequence of two Landau-Zener crossings. We find out that quite generally counting statistics and occupation statistics become unrelated, and that quantum interference affects them in different ways.
Description Reference: Physica E 42, 555 (2010)
Educational Use Research
Learning Resource Type Article
Page Count 9


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