Some quantum acoustic resonators possess a large number of phonon modes at different frequencies. Direct interactions between modes similar to those available for photonic devices have now been demonstrated. This enables manipulation of multimode states.
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Bienfait, A. Sound interactions across multiple modes. Nat. Phys. 20, 530–531 (2024). https://doi.org/10.1038/s41567-024-02425-z
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DOI: https://doi.org/10.1038/s41567-024-02425-z
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