研究目的
Investigating the decoy state quantum key distribution via the atmosphere channels to understand the effects of atmosphere turbulence on the key generation rate.
研究成果
The decoy state method is effective in channels with fluctuating transmittance, but atmosphere turbulence significantly reduces the secure key generation rate. This highlights the importance of characterizing atmosphere turbulence for realistic free-space quantum key distribution.
研究不足
The study is based on the beam-wandering model, which fits well under weak turbulence conditions but may not fully capture the complexity of real-world atmosphere turbulence. The analysis assumes certain fixed parameters, such as telescope size and wavelength, which may vary in practical applications.
1：Experimental Design and Method Selection:
The study employs the decoy state method with one-signal state and two-decoy states to investigate quantum key distribution in atmosphere channels. The beam-wandering model is used to simulate atmosphere turbulence.
2：Sample Selection and Data Sources:
The study uses theoretical models and numerical simulations to evaluate the performance of quantum key distribution under varying atmospheric conditions.
3：List of Experimental Equipment and Materials:
The study mentions the use of telescopes for photon emission and detection, with specific parameters such as radius and wavelength.
4：Experimental Procedures and Operational Workflow:
The study involves simulating the lossy channel with three beam splitters to model the atmosphere channel, Bob's receiving apparatus, and detector efficiency.
5：Data Analysis Methods:
The study uses numerical evaluation to compare the secret key rates of decoy and non-decoy methods under different atmospheric conditions.
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