Nonreciprocal Transport Based on Cavity Floquet Modes in Optomechanics

Laure Mercier De Lépinay, Caspar F. Ockeloen-Korppi, Daniel Malz, Mika A. Sillanpää

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Directional transport is obtained in various multimode systems by driving multiple, nonreciprocally interfering interactions between individual bosonic modes. However, systems sustaining the required number of modes become physically complex. In our microwave-optomechanical experiment, we show how to configure nonreciprocal transport between frequency components of a single superconducting cavity coupled to two drumhead oscillators. The frequency components are promoted to Floquet modes and generate the missing dimension to realize an isolator and a directional amplifier. A second cavity left free by this arrangement is used to cool the mechanical oscillators and bring the transduction noise close to the quantum limit. We furthermore uncover a new type of instability specific to nonreciprocal coupling. Our approach is generic and can greatly simplify quantum signal processing and the design of topological lattices from low-dimensional systems.

Original languageEnglish
Article number023603
JournalPhysical Review Letters
Issue number2
Publication statusPublished - 10 Jul 2020
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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