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Résumé |
Mechanics has historically played a pivotal role in science by providing the
basis for classical physics. Today, with the advent of nanoscale mechanical
devices combined with quantum electronic devices, we are witnessing a
renaissance in the field of mechanics. After an introductory introduction on the
mesoscopic physics of nanomechanical resonators, I will discuss our recent
advances on mechanical resonators based on carbon nanotubes. The nanotube in
these devices vibrates as a guitar string. Single-electron tunneling enables
coupling the mechanical vibrations to electrons by a large amount. I will show
how to use this coupling to create a nonlinear mechanical oscillator approaching
the quantum regime, where the resulting quantum energy levels of the mechanical
oscillator are no longer evenly spaced [1]. Using mechanical nanotubes hosting
multiple quantum dots, we expect that our approach may enable the realization of
a mechanical qubit [2] and a quantum simulator of quantum matters featuring
strong electron-phonon correlations [3,4].
[1] C Samanta, SL De Bonis, CB Møller, R Tormo-Queralt, W Yang, C Urgell, B
Stamenic, B Thibeault, Y Jin, DA Czaplewski, F Pistolesi, A Bachtold,
(arXiv:2211.07632) Nature Physics (2023).
[2] F. Pistolesi, A. N. Cleland, and A. Bachtold, Phys. Rev. X 11, 031027 (2021)
[3] U Bhattacharya, T Grass, A Bachtold, M Lewenstein, F Pistolesi, Nano Lett.
21, 9661 (2021)
[4] Lin Zhang, Utso Bhattacharya, Adrian Bachtold, Stefan Forstner, Maciej
Lewenstein, Fabio Pistolesi, Tobias Grass, npj Quantum Information 9, 7 (2023)
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