Quantum coder and decoder of phase modulated polarizing state and its application method

A phase modulator and quantum coding technology, which is applied in photonic quantum communication, instruments, electromagnetic wave transmission systems, etc., can solve the problems of incompensability, high bit error rate, and half efficiency, etc., achieve high-precision polarization compensation, and reduce bit errors rate effect
CN1477808AInactive Publication Date: 2004-02-25SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2004-02-25
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The present invention relates to a quantum coder and decoder with phase modulated polarization state and their application method in the quantum secure communication. Four-state quantum coder or decoder is formed from a phase-polarization controller and a ture random generator, and can implement quantum secure communication using "two linear polarization states and two circular polarization states" four-state coded BB84 protocol; and six-state quantum coder or decoder is formed from two phase-polarization controllers and a synchronous trigger, and can implement six-state coded quantum secure communication.
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Description

technical field

[0001] The invention relates to special equipment for quantum secure communication in the communication field and an application method thereof, in particular to a quantum encoder and decoder for phase modulation polarization state and an application method for quantum secure communication. Background technique

[0002] In the existing quantum secure communication technology, there are three types of protocols such as BB84 protocol, B92 protocol and E91 protocol, and three coding methods such as two-state coding, four-state coding and six-state coding. The BB84 protocol belongs to the four-state coding method, while the B92 protocol and the E91 protocol belong to the two-state coding method. The efficiency of the four-state coding method is relatively high, while the efficiency of the two-state coding method is halved.

[0003] The BB84 protocol usually adopts the phase modulation encoding method, that is, two identical Mach-Zehnder ...

Claims

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