Mechanical frequency control in inductively coupled electromechanical systems
Luschmann, Thomas (Munich Center for Quantum Science and Technology (MCQST))
Schmidt, Philip (Austrian Academy of Sciences. Institute for Quantum Optics and Quantum Information)
Deppe, Frank (Munich Center for Quantum Science and Technology (MCQST))
Marx, Achim (Bayerische Akademie der Wissenschaften. Walther-Meissner-Institut)
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física)
Gross, Rudolf (Munich Center for Quantum Science and Technology (MCQST))
Huebl, Hans (Munich Center for Quantum Science and Technology (MCQST))

Date:	2022
Abstract:	Nano-electromechanical systems implement the opto-mechanical interaction combining electromagnetic circuits and mechanical elements. We investigate an inductively coupled nano-electromechanical system, where a superconducting quantum interference device (SQUID) realizes the coupling. We show that the resonance frequency of the mechanically compliant string embedded into the SQUID loop can be controlled in two different ways: (1) the bias magnetic flux applied perpendicular to the SQUID loop, (2) the magnitude of the in-plane bias magnetic field contributing to the nano-electromechanical coupling. These findings are quantitatively explained by the inductive interaction contributing to the effective spring constant of the mechanical resonator. In addition, we observe a residual field dependent shift of the mechanical resonance frequency, which we attribute to the finite flux pinning of vortices trapped in the magnetic field biased nanostring.
Grants:	European Commission 736943
Note:	Altres ajuts: ICREA Academia, Generalitat de Catalunya
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Superconducting properties and materials ; Optomechanics ; Superconducting devices ; Quantum mechanics
Published in:	Scientific reports, Vol. 12 (January 2022) , art. 1608, ISSN 2045-2322

DOI: 10.1038/s41598-022-05438-x
PMID: 35102197

7 p, 2.2 MB

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