Volume 116, Number 6, December 2016
|Number of page(s)||6|
|Published online||16 February 2017|
Dephasing-controlled particle transport devices
1 Institut für Theoretische Physik, Universität Bremen - Otto-Hahn-Allee 1, D-28359, Bremen, Germany
2 Bremen Center for Computational Materials Science, Universität Bremen - Am Fallturm 1, D-28359, Bremen, Germany
3 Nano-Bio Spectroscopy Group and ETSF, Department of Materials Science, Universidad del País Vasco UPV/EHU - E-20018 San Sebastián, Spain
4 Max Planck Institute for the Structure and Dynamics of Matter Hamburg and Center for Free-Electron Laser Science and Department of Physics, University of Hamburg - Luruper Chaussee 149, D-22761, Hamburg, Germany
Received: 21 December 2016
Accepted: 26 January 2017
We study the role of dephasing in transport through different structures. We show that interference effects invalidate Kirchhoff's circuit laws in quantum devices and illustrate the emergence of Ohmic conduction under strong dephasing. We present circuits where the particle transport and the direction of rectification can be controlled through the dephasing strength. This suggests the possibility of constructing molecular devices with new functionalities which use dephasing as a control parameter.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 05.60.Gg – Quantum transport
© EPLA, 2016
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