Quantum magnetomechanics: Towards the ultrastrong coupling regime

E. Romero-Sánchez, W. P. Bowen, M. R. Vanner, K. Xia, and J. Twamley
Phys. Rev. B 97, 024109 – Published 19 January 2018

Abstract

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.

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  • Received 2 February 2017
  • Revised 18 December 2017

DOI:https://doi.org/10.1103/PhysRevB.97.024109

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

E. Romero-Sánchez1, W. P. Bowen1, M. R. Vanner1,2, K. Xia3,4, and J. Twamley3

  • 1ARC Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
  • 2Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 3ARC Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia
  • 4National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

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Issue

Vol. 97, Iss. 2 — 1 January 2018

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