研究目的
Investigating the feasibility and efficiency of sequential state discrimination of two coherent states for multiparty quantum key distribution.
研究成果
The proposed Banaszek model and Huttner-like model can optimally perform sequential state discrimination of two coherent states, facilitating multiparty QKD. The success probability of sequential state discrimination is higher than that of probabilistic quantum cloning, especially for coherent states with any amplitude.
研究不足
The study is limited to two coherent states and does not extend to N coherent states. The models may face challenges in practical implementation due to photon loss and require correction for optimal performance.
1：Experimental Design and Method Selection:
The study proposes optical designs (Banaszek model and Huttner-like model) for sequential state discrimination of two coherent states without electric feedback.
2：Sample Selection and Data Sources:
Utilizes binary phase-shifting-key (BPSK) signals and general coherent states with arbitrary prior probabilities.
3：List of Experimental Equipment and Materials:
Beam splitter, beam combiner, photon detector, and displacement operator.
4：Experimental Procedures and Operational Workflow:
The models discriminate non-orthogonal two coherent states without error and produce post-measurement states for sequential discrimination.
5：Data Analysis Methods:
Success probability of sequential state discrimination is analyzed using constrained optimization.
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