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Charge transfer counting statistics revisited
Umeå University, Faculty of Science and Technology, Department of Physics. (Quantum Theory Group)
Umeå University, Faculty of Science and Technology, Department of Physics. (Quantum Theory Group)
2003 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 63, no 4, 485-491 p.Article in journal (Refereed) Published
Abstract [en]

Charge transfer statistics of quantum particles is obtained by analysing the time evolution of the many-body wave function. Exploiting properly chosen gauge transformations, we construct the probabilities for transfers of a discrete number of particles. Generally, the derived formula for counting statistics differs from the one previously obtained by Levitov et al. (J. Math. Phys., 37 (1996) 4845). The two formulae agree only if the initial state is prohibited from being a superposition of different charge states. Their difference is illustrated for cases of a single particle and a tunnel junction, and the role of charge coherence is demonstrated

Place, publisher, year, edition, pages
2003. Vol. 63, no 4, 485-491 p.
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Physical Sciences
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URN: urn:nbn:se:umu:diva-40477DOI: 10.1209/epl/i2003-00567-2OAI: oai:DiVA.org:umu-40477DiVA: diva2:399800
Available from: 2011-02-23 Created: 2011-02-23 Last updated: 2011-02-24Bibliographically approved

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Shelankov, AndreiRammer, Jörgen

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