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Two-Emitter Multimode Cavity Quantum Electrodynamics.pdf
The article focuses on the integration of color centers, specifically silicon vacancy (VSi) defects, into thin-film 4H-silicon carbide-on-insulator (4H-SiCOI) photonic devices for use in cavity quantum electrodynamics (CQED). These devices aim to facilitate quantum information processing applications by enhancing the interaction between color centers (which act as long-lived spin-based qubits) and light through optical cavities.
Key findings include:
Cooperativity and Superradiance: The study demonstrates a high cooperativity between single color centers and the microdisk resonators, achieving cooperativities up to 0.8. The system also exhibits optical superradiance from a pair of color centers coupled to the same cavity mode.
Multimode Interference: The study investigates the effects of multimode interference on photon scattering dynamics in the two-emitter cavity system. This effect is significant in understanding photon emission and is essential for optimizing quantum network performance.
Cavity-Emitter Coupling: Using a microdisk resonator integrated with waveguides, the coupling efficiency is measured, and Purcell enhancements of up to 39 are observed. The high-quality factor of the resonator allows for strong emitter-cavity interactions.
Dipole-Induced Transparency (DIT): The paper reports the observation of dipole-induced transparency (DIT) and photon statistics measurements, which are crucial for spin-photon entanglement and communication in quantum networks.
Two-Emitter Photon Interference: The authors successfully observe two-photon interference between two VSi color centers. This is essential for developing remote entanglement protocols and high-efficiency quantum information processing systems.
Entanglement Protocols: The work highlights how a carefully controlled phase between two emitters can be used to create and measure entanglement, making this a crucial step for future quantum networks.
In conclusion, this study bridges the gap between classical photonics and quantum technologies by integrating color centers into scalable, CMOS-compatible photonic platforms, opening the door to more complex, high-efficiency quantum communication and computation systems.
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