Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 65: Nano-Optics IV

Q 65.5: Vortrag

Freitag, 27. März 2015, 12:00–12:15, C/HSO

Quantum single-electron tunnelling motor — •Pablo Carlos Lopez1, Alan Celestino1, Alex Croy1,2, and Alex Eisfeld11Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany — 2Department of applied Physics, Chalmers University of Technology, 41296 Göteborg, Sweden

In Ref [1] the dynamics of a nano-electromechanical rotor driven by a single-electron tunneling has been considered using classical equations of motion for the rotor and a mean field approach. The device is described by a rod that has attached two quantum dots on its extremities. The rod can freely rotate about a fixed axis. The device is located between two Fermionic baths which couple to the rod via tunneling of single electrons to the quantum dots. The baths also provide a static bias voltage that drives the system. In the classical treatment of Ref [1] some interesting phenomena have been observed, like a negative differential conductance. Possible applications of such device are for example signal amplification, current rectification and viscosity measurements.

In the present work we present a full quantum description of this system and discuss similarities and differences to the classical results.

[1] EPL (Europhys Lett) 98, 68004

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