A quantum communication system without polarization feedback and a quantum-safe direct communication method

A quantum communication and communication receiving technology, which is applied in the field of quantum information, can solve the problems of manual modulation of polarization drift and difficult operation, and achieve the effect of reducing polarization sensitivity and improving communication quality

Active Publication Date: 2022-08-09
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] In view of this, the technical problem to be solved by the present invention is how to provide a quantum communication system without polarization feedback and a quantum safe direct communication method to solve the need for manual modulation and operation of polarization drift in existing quantum safe direct communication. difficult problem

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  • A quantum communication system without polarization feedback and a quantum-safe direct communication method
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  • A quantum communication system without polarization feedback and a quantum-safe direct communication method

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Embodiment 1

[0045] figure 1 Show the structural diagram of the quantum communication system that does not require polarized feedback provided by the Example I of the present invention. figure 1 The quantum communication system of the present invention includes a communication receiving module 1. The communication sending module 3 and the quantum channel 2 between the two parties;

[0046] Communication receiving module 1 includes laser sources 6, attenuated 7, first looper 8, first bouquet 9, second sub -bouquet device 11, first phase modulator 10, first single photon detector 12, and second second, second, and second Single -light sub -detector 13; Laser 6 connect to attenuator 7, attenuator 7 connect to the first loop 8, the first loop 8 connects to the first bouquet 9, the first bouquet 9 is the first to the first and the first, respectively. The phase modulator 10 and the second bouquet 11 are connected. The first cycle 8 is connected to the first single photon detector 12, and the secon...

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Abstract

The invention relates to a quantum communication system without polarization feedback and a quantum safe direct communication method. The quantum communication system of the invention comprises a communication receiving module, a communication sending module and a quantum channel between the two parties; a first phase modulation in the communication receiving module The device can prepare photons in four random phases for the communication sending module, and obtain qubits by detecting the photons returned by the communication sending module through a single photon detector; the communication sending module includes an encoding optical path module and a security detection module. The invention utilizes the consistency of the coded optical path and the stability of the safety detection optical path to avoid the influence of polarization drift caused by birefringence.

Description

Technical field [0001] The invention involves the field of quantum information technology, and it specially involves a quantum communication system and quantum security method without polarizing feedback. Background technique [0002] Quantum security direct communication is a new type of communication mode proposed by Longguiru and others in 2002. It breaks the traditional dual channel model. The two parties of the communication only use a quantum channel to pass information. Quantum security direct communication is a combination of classic coding theory and eavesdropping channel theory. It does not need to use quantum memory, nor does it need to generate key encryption information. In fact, it is now highly efficient, real -time, and secure information transmission. [0003] Quantum security direct communication needs to meet two requirements: 1. After receiving the quantum state of the communication receiver, the confidential information sent by the sender can be directly read...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70H04L9/08
CPCH04B10/70H04L9/0852Y04S40/20
Inventor 韦克金刘馨罗迪冯瑶马迪耿明敏张振荣
Owner GUANGXI UNIV
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