Ground state cooling of nanomechanical resonators by electron transport

Year: 2019

Authors: Rastelli G., Belzig W.

Autors Affiliation: Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany; Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany.

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.

Journal/Review: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS

Volume: 227 (15-16)      Pages from: 1885  to: 1895

More Information: We thank Pascal Stadler for useful discussions. This work was supported by the Excellence Initiative through the Zukunftskolleg and by the DFG through the SFB 767.
KeyWords: Quantum; Spin
DOI: 10.1140/epjst/e2018-800065-2