In a study published in Physical Review Letters, researchers demonstrate distant magnon-magnon coupling mediated by a superconducting resonator which serves as a coherent data bus for coherent magnonic interactions.
Fig. 1: Remote magnon-magnon coupling mediated by a superconducting resonator in the dispersive regime. Inset: Schematic of the two-YIG-sphere superconducting circuit design.
Scientific Achievement
Realization of coherent coupling of two remote magnonic resonators on a superconducting resonator circuit.
Significance and Impact
Elucidated a new quantum magnonic network on a superconducting platform for efficient magnon-based quantum information transduction.
Research Details
- Fabricated a hybrid magnonic superconducting circuit with chip-imbedded single-crystal YIG spheres (Fig. 1 inset).
- Obtained state-of-the-art coherence times down to 1 MHz for both magnons and photons at cryogenic temperatures.
- Recorded a magnon-photon coupling strength of 130 MHz and a cooperativity of 13,000 for a 250-μm-diameter YIG sphere.
- Achieved superconducting-resonator-mediated remote magnon-magnon coupling in the dispersive regime (Fig. 1).
- Observed dissipative magnon-magnon coupling.