Ultrastrong coupling between electron tunneling and mechanical motion
Journal article, 2022
The ultrastrong coupling of single-electron tunneling and nanomechanical motion opens exciting opportunities to explore fundamental questions and develop new platforms for quantum technologies. We have measured and modeled this electromechanical coupling in a fully suspended carbon nanotube device and report a ratio of gm/ωm=2.72±0.14, where gm/2π=0.80±0.04GHz is the coupling strength and ωm/2π=294.5MHz is the mechanical resonance frequency. This is well within the ultrastrong coupling regime and the highest among all other electromechanical platforms. We show that, although this regime was present in similar fully suspended carbon nanotube devices, it went unnoticed. Even higher ratios could be achieved with improvement on device design.
Author
Florian Vigneau
University of Oxford
Juliette Monsel
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Jorge Tabanera
Complutense University
Kushagra Aggarwal
University of Oxford
Léa Bresque
Grenoble Alpes University
Federico Fedele
University of Oxford
Federico Cerisola
University of Exeter
University of Oxford
G. A.D. Briggs
University of Oxford
Janet Anders
University of Potsdam
University of Exeter
Juan M.R. Parrondo
Complutense University
Alexia Auffèves
Grenoble Alpes University
Natalia Ares
University of Oxford
Physical Review Research
26431564 (ISSN)
Vol. 4 4 043168Värmeströmsfluktuationer och dens inverkan på lokala temperaturer och potentialer
Swedish Research Council (VR) (2018-05061), 2019-01-01 -- 2022-12-31.
Subject Categories
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1103/PhysRevResearch.4.043168