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Generation of multiphoton quantum states on silicon
Ming Zhang1,2, Lan-Tian Feng3,4, Zhi-Yuan Zhou3,4
11State Key Laboratory for Modern Optical Instrumentation, Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Zijingang Campus, Hangzhou, 310058 China.
Light, Science & Applications
|May 10, 2019
Summary
Researchers generated multiphoton quantum states using silicon nanophotonics. This breakthrough advances quantum technologies and fundamental quantum science understanding with high-fidelity quantum interference.
Area of Science:
- Quantum optics and information science
- Nanophotonics and integrated quantum technologies
Background:
- Multiphoton quantum states are crucial for advancing quantum technologies and understanding quantum mechanics.
- Integrated photonics offers a scalable and stable platform for generating high-brightness photonic quantum states.
Purpose of the Study:
- To demonstrate the generation of multiphoton quantum states using a single silicon nanophotonic waveguide.
- To characterize the generated states through quantum interference and tomography.
Main Methods:
- Utilized a single silicon nanophotonic waveguide for multiphoton state generation.
- Employed low-pump power (600 μW) to achieve a detected four-photon rate of 0.34 Hz.
- Performed multiphoton quantum interference and quantum state tomography for characterization.
Main Results:
- Achieved a detected four-photon rate of 0.34 Hz with low pump power.
- Demonstrated high quantum interference visibility (>95%) for the generated four-photon states.
- Obtained a quantum state fidelity of 0.78 ± 0.02.
Conclusions:
- Successfully generated multiphoton quantum states in a scalable silicon nanophotonic platform.
- The generated states exhibit high-fidelity quantum interference, suitable for quantum information processing.
- The source's compatibility with on-chip quantum manipulation and detection paves the way for large-scale quantum photonic integrated circuits (QPICs).
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