Polarization state ambiguity resolution method when evolutionary reconstruction is incomplete
A polarization state and ambiguity technology, which is applied to secure communication devices and key distribution, can solve the problems of inability to predict and compensate the polarization state, ambiguity, etc.
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[0023] Preferred embodiments of the present invention will be described below. While preferred embodiments of the present invention have been shown in the examples, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein.
[0024] A quantum key distribution system implemented according to the BB84 protocol, which uses two sets of non-orthogonal bases {|H>, |V>}, {|+>, |->} for encoding and decoding, and reconstructs the results according to the evolution The polarization state ambiguity elimination method when the evolution reconstruction is incomplete is used in the process of polarization state prediction and compensation, which includes the following steps:
[0025] (a) The sending end and the receiving end perform quantum communication, and the reconstructed polarization state is denoted as |H>;
[0026] (b) Obtain the average function of |H> in the current compensation period, denoted as ρ ...
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