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Cavity piezo-mechanics for superconducting-nanophotonic quantum interface
Xu Han1,2, Wei Fu1, Changchun Zhong3,4,5
1Department of Electrical Engineering, Yale University, New Haven, CT, 06520, USA.
Nature Communications
|June 28, 2020
Summary
Researchers developed a hybrid quantum platform coupling microwave and optical systems. This breakthrough enables efficient microwave-optical photon conversion at cryogenic temperatures, advancing quantum networks.
Area of Science:
- Quantum Physics
- Quantum Engineering
- Nanophotonics
Background:
- Hybrid quantum systems are crucial for distributed quantum networks.
- Piezo-mechanics at superconducting qubit frequencies offer a promising interface between quantum processors and optical channels.
- Integrating superconducting and optomechanical elements at cryogenic temperatures with strong interactions is challenging.
Purpose of the Study:
- To demonstrate a novel integrated superconducting cavity piezo-optomechanical platform.
- To achieve resonant coupling between gigahertz phonons and photons in both superconducting and nanophotonic cavities.
- To showcase coherent interactions and efficient microwave-optical photon conversion at cryogenic temperatures.
Main Methods:
- Fabrication of an integrated superconducting cavity piezo-optomechanical platform.
- Resonant coupling of 10 GHz phonons with photons in superconducting and nanophotonic cavities.
- Utilizing large piezo-mechanical cooperativity (C_em ~7) and pulsed optical pumping to enhance optomechanical coupling.
Main Results:
- Demonstrated resonant coupling between 10 GHz phonons and photons.
- Achieved efficient microwave-optical photon conversion at cryogenic temperatures.
- Observed coherent interactions facilitated by the hybrid interface.
Conclusions:
- The developed hybrid interface is a significant step towards large-scale quantum communication.
- The platform opens avenues for novel explorations in microwave-optical photon entanglement.
- Enables new possibilities in quantum sensing mediated by gigahertz phonons.
