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An Information Leakage-Free Quantum Dialogue Method Based on Entanglement Exchange Between Any Two Bell States in Cavity QED

A technology of entanglement exchange and information leakage, which can be used in secure communication devices, digital transmission systems, electrical components, etc., and can solve problems such as information leakage and quantum dialogue information leakage.

Active Publication Date: 2016-03-23
浙江海宁经编产业园区开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two methods in [27] still have the problem of information leakage
At present, the information leakage problem of quantum dialogue needs to be further solved

Method used

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  • An Information Leakage-Free Quantum Dialogue Method Based on Entanglement Exchange Between Any Two Bell States in Cavity QED
  • An Information Leakage-Free Quantum Dialogue Method Based on Entanglement Exchange Between Any Two Bell States in Cavity QED
  • An Information Leakage-Free Quantum Dialogue Method Based on Entanglement Exchange Between Any Two Bell States in Cavity QED

Examples

Experimental program
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Embodiment

[0089] 1. Application example of quantum dialogue method

[0090] Two adjacent Bell states (A 1 , B 1 ) and (A 2 , B 2 ) as an example to illustrate the dialogue process. Suppose Alice's two-bit secret information is 01, and Bob's two-bit secret information is 10. Moreover, suppose Alice prepared two Bell states (A 1 , B 1 ) and (A 2 , B 2 ) are in |Ψ - >. In other words, (A 1 , B 1 ) and (A 2 , B 2 ) correspond to and Alice to atom A 1 Apply unitary operation σ x to encode her two-bit secret information, so when the transmission process of the two atomic sequences is over, the first group in Bob’s hands contains two Bell states {(σ x A 1 , B 1 ), (A 2 , B 2 )}. Bob first to (A 2 , B 2 ) for Bell-based measurements. Correspondingly, he can know that the initial state of the first group prepared by Alice is |Ψ - >. Then, according to his Bell basis measurement results, Bob regenerates a new pair of (A 2 , B 2 ). Then, Bob for the new atom B 2 A...

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Abstract

The invention provides an information non-leakage quantum conversation protocol based on cavity QED any-two-Bell-status entanglement exchange. The automatic evolution law in cavity QED and the result of the any-two-Bell-status entanglement exchange are effectively utilized. Meanwhile, according to the protocol, a shared secret Bell-status is also utilized for solving the problem of information leakage, and mutual secret information of both legal sides of the Alice and the Bob can be exchanged in an information non-leakage mode. The shared secret Bell-status plays two roles in enabling the Bob to know the preparative initial status and being used for encoding the secrete information of the Bob and for conducting the entanglement exchange. In addition, the protocol can resist an initial attack, such as interception and retransmission of the attack, measurement and retransmission of the attack and entanglement and measurement of the attack, of an external eavesdropper.

Description

technical field [0001] The invention relates to the field of quantum security communication. The invention designs an information-leakage quantum dialogue method based on the entanglement exchange of any two Bell states in the cavity QED, effectively utilizes the evolution law of atoms in the cavity QED and the entanglement exchange results of any two Bell states, and utilizes a shared secret Bell To overcome the problem of information leakage. Background technique [0002] In the field of quantum secure communication, Quantum Secure Direct Communication (Quantum Secure Direct Communication, QSDC) is used to directly transmit secret information from one communicating party to another communicating party without establishing a key for encryption in advance. Unfortunately, many QSDC methods [1-10] are only one-way communication methods. In other words, in these QSDC methods [1-10], the communicating parties cannot exchange their secret information simultaneously. Fortunatel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L29/06
Inventor 叶天语
Owner 浙江海宁经编产业园区开发有限公司