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Experimentally Verified Approach to Nonentanglement-Breaking Channel Certification
Yingqiu Mao1,2, Yi-Zheng Zhen1,3, Hui Liu1,2
1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Physical Review Letters
|January 25, 2020
Summary
We developed a practical method to certify nonentanglement-breaking (non-EB) quantum channels. This approach is robust against experimental imperfections and noise, ensuring reliable quantum state distribution and storage.
Area of Science:
- Quantum Information Science
- Quantum Communication Protocols
- Quantum Channel Characterization
Background:
- Ensuring the nonentanglement-breaking (non-EB) property of quantum channels is vital for secure quantum communication and state storage.
- Current methods for certifying non-EB channels often lack practicality or are susceptible to experimental imperfections.
- A direct, accurate, and robust certification method is needed for real-world quantum technologies.
Purpose of the Study:
- To propose and experimentally verify a realistic, source-based, measurement device-independent certification of non-EB quantum channels.
- To demonstrate the resilience of the proposed method against common experimental challenges like multiphotons and imperfect state preparation.
- To validate the certification accuracy using a semiquantum signaling game framework.
Main Methods:
- Development of a source-based, measurement device-independent certification protocol for non-EB quantum channels.
- Experimental implementation using realistic conditions, including imperfect state preparation and potential multiphoton components.
- Validation through comparison with theoretical predictions and analysis of a semiquantum signaling game.
Main Results:
- Successful experimental verification of the proposed certification method with good agreement between theory and practice.
- Demonstrated robustness against experimental imperfections and noise, confirming the method's reliability.
- Accurate certification of non-EB quantum channels was achieved, even with an information-incomplete measurement set.
Conclusions:
- The proposed measurement device-independent certification is a practical and robust solution for validating non-EB quantum channels.
- This method significantly enhances the reliability of quantum state distribution and storage in realistic quantum networks.
- The approach is expected to be instrumental in the design and evaluation of future quantum communication systems.
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