Ultrastrong Parametric Coupling between a Superconducting Cavity and a Mechanical Resonator

G. A. Peterson, S. Kotler, F. Lecocq, K. Cicak, X. Y. Jin, R. W. Simmonds, J. Aumentado, J. D. Teufel

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


We present a new optomechanical device where the motion of a micromechanical membrane couples to a microwave resonance of a three-dimensional superconducting cavity. With this architecture, we realize ultrastrong parametric coupling, where the coupling not only exceeds the dissipation in the system but also rivals the mechanical frequency itself. In this regime, the optomechanical interaction induces a frequency splitting between the hybridized normal modes that reaches 88% of the bare mechanical frequency, limited by the fundamental parametric instability. The coupling also exceeds the mechanical thermal decoherence rate, enabling new applications in ultrafast quantum state transfer and entanglement generation.

Original languageAmerican English
Article number247701
JournalPhysical Review Letters
Issue number24
StatePublished - 12 Dec 2019
Externally publishedYes

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Publisher Copyright:
© 2019 American Physical Society. American Physical Society.


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