Quantum magnetomechanics: Towards the ultrastrong coupling regime

E. Romero-Sánchez, W. P. Bowen, M. R. Vanner, K. Xia, J. Twamley

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
26 Downloads (Pure)


In this paper we investigate a hybrid quantum system comprising a mechanical oscillator coupled via magnetic induced electromotive force to an LC resonator. We derive the Lagrangian and Hamiltonian for this system and find that the interaction can be described by a charge-momentum coupling with a strength that has a strong geometry dependence. We focus our study on a mechanical resonator with a thin-film magnetic coating which interacts with a nanofabricated planar coil. We determine that the coupling rate between these two systems can enter the strong and ultrastrong coupling regimes with experimentally feasible parameters. This magnetomechanical configuration allows for a range of applications including electromechanical state transfer and weak-force sensing.

Original languageEnglish
Article number024109
Pages (from-to)1-12
Number of pages12
JournalPhysical Review B
Issue number2
Publication statusPublished - 19 Jan 2018

Bibliographical note

Copyright 2018 American Physical Society. Firstly published in Physical Review B, 97, 024109. The original publication is available at https://doi.org/10.1103/PhysRevB.97.024109. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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