An interacting adiabatic quantum motor

Bruch, Anton; Viola-Kusminskiy, Silvia; Refael, Gil; von Oppen, Felix

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An interacting adiabatic quantum motor

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Viola-Kusminskiy, Silvia
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Bruch, A., Viola-Kusminskiy, S., Refael, G., & von Oppen, F. (submitted). An interacting adiabatic quantum motor.

Cite as: https://hdl.handle.net/21.11116/0000-0001-42B1-C

Abstract

We present a field theoretic treatment of an adiabatic quantum motor. We explicitly discuss a motor termed Thouless motor which is based on a Thouless pump operating in reverse. When a sliding periodic potential is considered as the motor degree of freedom, a bias voltage applied to the electron channel sets the motor in motion. We investigate a Thouless motor whose electron channel is modeled as a Luttinger liquid. Interactions increase the gap opened by the periodic potential. For an infinite Luttinger liquid the coupling induced friction is enhanced by electron-electron interactions. When the LL is ultimately coupled to Fermi liquid reservoirs, the dissipation reduces to its value for a noninteracting electron system for a constant motor velocity. Our results can also be applied to a motor based on a nanomagnet coupled to a quantum spin Hall edge.