Noise-assisted Thouless pump in elastically deformable molecular junctions

Abstract

We study a Thouless pump realized with an elastically \textit{deformable quantum dot} whose center of mass follows a non-linear stochastic dynamics. The interplay of noise, non-linear effects, dissipation and interaction with an external time-dependent driving on the pumped charge is fully analyzed. The results show that the quantum pumping mechanism not only is not destroyed by the force fluctuations, but it becomes stronger when the forcing signal frequency is tuned close to the resonance of the vibrational mode. The robustness of the quantum pump with temperature is also investigated and an exponential decay of the pumped charge is found when the coupling to the vibrational mode is present. Implications of our results for nano-electromechanical systems are also discussed.

2 Appendices and figures added

References in corpus (12)

• Quantum-Limited Position Detection and Amplification: A Linear Response Perspective
• Electron pumping in graphene mechanical resonators
• Adiabatic quantum motors
• Charge pumping in carbon nanotube quantum dots
• Nanoampere pumping of Cooper pairs
• Non adiabatic features of electron pumping through a quantum dot in the Kondo regime
• Phase coherence, inelastic scattering, and interaction corrections in pumping through quantum dots
• Non-adiabatic transport in a quantum dot turnstile
• Single-parameter adiabatic charge pumping in carbon nanotube resonators
• Non-linear dynamics of a driven nanomechanical single electron transistor
• Memory effects in adiabatic quantum pumping with parasitic nonlinear dynamics
• Parasitic pumping currents in an interacting quantum dot

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