Quantum key distribution method based on single photon multi-degree of freedom irrelevant to measurement device
A technology for quantum key distribution and measurement equipment, applied in the field of quantum key distribution, can solve the problems of small channel capacity, detector attack, low coding rate, etc., so as to improve the coding rate, improve the utilization rate, and ensure reliability. and safety effects
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0019] Such as figure 1 , the measurement device-independent quantum key distribution method based on single-photon multi-degree-of-freedom of the present invention comprises:
[0020] Step 1: User 1 and User 2 randomly select one of the linear basis and the diagonal basis to encode the single photon state with two degrees of freedom in space and polarization, and send the encoded single photon state to the third party for measurement through the quantum channel device.
[0021] Specifically, in this step, user 1 and user 2 are responsible for the preparation state, and the third-party measuring device is responsible for the measurement state. First, user 1 and user 2 use the polarization controller to randomly prepare one of the four polarization degrees of freedom quantum states, namely: where |H> and |V> are the horizontal and vertical polarization states of t...
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