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Modeling of open quantum dots and wave billiards using imaginary potentials for the source and the sink
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics . Linköping University, The Institute of Technology.
Ericsson AB.
2010 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 12, no 073005Article in journal (Refereed) Published
Abstract [en]

A heuristic model for particle states and current flow in open ballistictwo-dimensional (2D) quantum dots/wave billiards is proposed. The modelmakes use of complex potentials first introduced in phenomenological nuclearinelastic scattering theory (the optical model). Here we assume that externalinput and output leads connecting the system to the source and the drain regionsmay be represented by complex potentials. In this way, a current may be set upbetween the two ‘pseudo-leads’. Probability densities and current flows for anopen quantum dot are analyzed here numerically and the results are comparedwith the microwave measurements used to emulate the system. The model isof conceptual as well as practical interest. In addition to quantum billiards, itmay be used as a tool per se to analyze transport in classical wave analogues,such as microwave resonators, acoustic resonators, effects of leakage on suchsystems, etc.

Place, publisher, year, edition, pages
2010. Vol. 12, no 073005
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-57917DOI: 10.1088/1367-2630/12/7/073005OAI: oai:DiVA.org:liu-57917DiVA: diva2:328714
Available from: 2010-07-06 Created: 2010-07-06 Last updated: 2017-12-12

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Berggren, Karl-FredrikYakimenko, Irina

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