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Error Performance of Amplitude Shift Keying-Type Asymmetric Quantum Communication Systems
Tiancheng Wang1,2, Tsuyoshi Sasaki Usuda2
1Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Kanagawa, Japan.
Entropy (Basel, Switzerland)
|May 28, 2022
Summary
This study introduces an asymmetric quantum communication (AQC) system using entangled states. The quasi-Bell state shows a clear performance advantage over classical communication and other quantum states, approaching the universal error bound.
Area of Science:
- Quantum communication
- Quantum information theory
- Quantum optics
Background:
- Asymmetric quantum communication (AQC) systems offer enhanced security and efficiency.
- Entangled states are crucial resources for quantum information processing.
- Evaluating receiver performance is key to developing practical AQC systems.
Purpose of the Study:
- To evaluate the communication performance of a proposed receiver for an amplitude shift keying-type AQC system.
- To compare the performance of AQC systems using different entangled states against an asymmetric classical communication (ACC) system.
- To analyze the error probability of AQC systems utilizing quasi-Bell states.
Main Methods:
- Analytical derivation of error probability for AQC systems using quasi-Bell states.
- Performance comparison between AQC systems (using two-mode squeezed vacuum state and quasi-Bell states) and an ACC system (using coherent states).
- Evaluation of receiver performance in the proposed AQC system.
Main Results:
- The AQC system using the quasi-Bell state demonstrates a significant performance advantage over the ACC system under specific conditions.
- The quasi-Bell state in AQC systems achieved performance close to the universal lower bound on error probability.
- The two-mode squeezed vacuum state did not achieve the universal lower bound as effectively as the quasi-Bell state.
Conclusions:
- The proposed AQC system using quasi-Bell states offers superior performance compared to classical communication and other quantum states.
- Quasi-Bell states are highly effective for achieving low error probabilities in AQC, nearing theoretical limits.
- This research provides a foundation for developing advanced AQC systems with enhanced performance.
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