Unlock instant, AI-driven research and patent intelligence for your innovation.

A Controlled Quantum Secure Direct Communication Method Based on Four-Particle Cluster State

A secure direct communication, four-particle technology, applied in the field of controlled quantum secure direct communication based on cluster states, can solve problems such as entanglement property destruction, achieve high security, improve security, and sequence irreversible effects

Active Publication Date: 2020-01-10
NORTHWEST UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scheme, once the GHZ state used is measured, the entanglement property is destroyed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Controlled Quantum Secure Direct Communication Method Based on Four-Particle Cluster State
  • A Controlled Quantum Secure Direct Communication Method Based on Four-Particle Cluster State
  • A Controlled Quantum Secure Direct Communication Method Based on Four-Particle Cluster State

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Quantum states commonly used in communications in the past include Bell state, GHZ state, and W state. This scheme uses a four-particle cluster state. Since the cluster state has a better continuous entanglement property, which makes the self-associated structure stable, even if it is measured, the entanglement property is not easy to be destroyed, and it is not easy to be disturbed by the decoherence effect. measurement, the remaining two particles are projected into a Bell state, and continue to maintain the entangled state. Therefore, in such an encryption scheme, Alice does not use entanglement exchange, but passes the quantum state through a local unitary operation and sends the measured classical bit string to the legal receiver, and the receiver can only recover with the permission of the controller Charlie. The original information further improves the security of the communication process.

[0034] Assume that Alice and Bob are the legal sender and receiver re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a controlled quantum secure direct communication method based on four-particle cluster states. Alice and Bob are respectively the legal information sender and receiver in the quantum communication process, and Charlie is the trusted scheme controller; channel security Use randomly inserted single photons for measurement base comparison detection, and start communication after the detection is safe; Alice prepares four-particle cluster states into two-by-two groups, performs an XOR operation on the sent information with the pseudo-random sequence, and then encodes it through unitary transformation On the two particles retained by Alice. Alice keeps the particle pairs for herself through Bell basis measurement and sends the measurement information to Bob. After comparing the measurement information, Bob recovers the original sequence through the initial state sent by Charlie. The four-particle cluster state used in the present invention has relatively good entanglement, connectivity and anti-destruction. The receiver Bob in the method can only restore the original information with the permission of the controller Charlie, which can effectively prevent attacks on the information during the transmission process. , and the implementation process is simple.

Description

technical field [0001] The invention belongs to the technical field of quantum security communication, and in particular relates to a controlled quantum security direct communication (CQSDC) method based on a cluster state. Background technique [0002] Quantum communication uses the principle of quantum mechanics for information transmission and processing, which has the advantages of high security and high capacity. Quantum secure direct communication is a new type of quantum communication mode that directly transmits secret information in quantum channels, and has developed rapidly in recent years. [0003] Document 1 "Li Songsong, Nie Yiyou, Hong Zhihui, Yi Xiaojie, Huang Yibin, Controlled Teleportation Using Four-Particle Cluster State [J]. Communication Theory Phys, 2008, 50(9): 633-636." proposed a method based on A four-particle cluster state controllable information transmission scheme. In this scheme, the quantum information of the single-photon state or the enta...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0852
Inventor 曹正文宋丹彭进业曾贵华李艳赵光
Owner NORTHWEST UNIV