Abstract
We discuss two theoretical proposals for controlling the nonequilibrium steady state of nanomechanical resonators using quantum electronic transport. Specifically, we analyse two approaches to achieve the ground-state cooling of the mechanical vibration coupled to a quantum dot embedded between (i) spin-polarised contacts or (ii) a normal metal and a superconducting contact. Assuming a suitable coupling between the vibrational modes and the charge or spin of the electrons in the quantum dot, we show that ground-state cooling of the mechanical oscillator is within the state of the art for suspended carbon nanotube quantum dots operating as electromechanical devices.
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Rastelli, G., Belzig, W. Ground state cooling of nanomechanical resonators by electron transport. Eur. Phys. J. Spec. Top. 227, 1885–1895 (2019). https://doi.org/10.1140/epjst/e2018-800065-2
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DOI: https://doi.org/10.1140/epjst/e2018-800065-2