Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPENS-MDQ
Subjects cond-mat
Date Thursday 28 September 2023
Time 11:00
Institute LPENS
Seminar Room Salle Dussane, 45 rue d'Ulm
Speaker's Last Name Bachtold
Speaker's First Name Adrian
Speaker's Email Address
Speaker's Institution ICFO Barcelona
Title The sound of tiny guitars approaching the quantum regime
Abstract 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)
arXiv Preprint Number

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