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oai:docta.ucm.es:20.500.14352/729512023-08-26T00:46:04Zcom_20.500.14352_14col_20.500.14352_15

Tabanera Bravo, Jorge Rodríguez Parrondo, Juan Manuel otros, ... 2023-06-22T12:37:38Z 2023-06-22T12:37:38Z 2022-12-07 2643-1564 10.1103/PhysRevResearch.4.043168 https://hdl.handle.net/20.500.14352/72951 http://dx.doi.org/10.1103/PhysRevResearch.4.043168 https://journals.aps.org/ 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/omega m = 2.72 +/- 0.14, where gm/2 pi = 0.80 +/- 0.04 GHz is the coupling strength and omega m/2 pi = 294.5 MHz 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. eng https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Ultrastrong coupling between electron tunneling and mechanical motion journal article