Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review A

Quantum secure direct communication with χ -type entangled states

Song Lin, Qiaoyan Wen, Fei Gao, Fu-Chen Zhu

Published Dec 23, 2008• 224 citations
Publisher

Abstract

In this paper, a quantum secure direct communication protocol with $\ensuremath{\chi}$-type entangled states ${\ensuremath{\mid}{\ensuremath{\chi}}^{00}⟩}_{3214}$ is proposed. We analyze the security of this protocol and prove that it is secure in ideal conditions. Then, an alternative way is presented to ensure the security of this protocol in a noisy channel. Moreover, this protocol utilizes quantum superdense coding to achieve a high intrinsic efficiency and source capacity. The practical implementation of this protocol is also discussed.

DOI
10.1103/physreva.78.064304

Related papers

Quantum Secure Direct Communication with Five-Qubit Entangled State

Song Lin, Fei Gao, Xiao-Fen Liu

Recently, a genuine five-qubit entangled state has been achieved by Brown et al.[ J. Phys. A 38 (2005) 1119 ]. Later it was indicated that this state can be used for quantum teleportation and quantum state sharing. Here we build a quantum secure direct communication protocol with this state, and prove that it is secure in ideal conditions. In the protocol, the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the receiver. The receiver then performs projective determinate measurement to decode the secret message directly. Furthermore, this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.

Chinese Physics Letters•Mar 1, 2011•16 citations

Quantum secure direct communication with high-dimension quantum superdense coding

Chuan Xi Wang, Fu‐Guo Deng, Yansong Li +2 more

A protocol for quantum secure direct communication with quantum superdense coding is proposed. It combines the ideas of block transmission, the ping-pong quantum secure direct communication protocol, and quantum superdense coding. It has the advantage of being secure and of high source capacity.

Physical Review A•Apr 28, 2005•934 citations

Quantum secure direct communication with pure entangled states

Jian Wang, Quan Zhang, Chaojing Tang

We present a quantum secure direct communication protocol where the channels are not maximally entangled states. The communication parties utilize decoy photons to check eavesdropping. After ensuring the security of the quantum channel, the sender encodes the secret message and transmits it to the receiver by using Controlled-NOT operation and von Neumann measurement. The protocol is simple and realizable with present technology. We also show the protocol is secure for noisy quantum channel.

arXiv:quant-ph/0606236•Jun 28, 2006•0 citations

Three-party quantum secret sharing of secure direct communication based on χ-type entangled states

Yu‐Guang Yang, Weifeng Cao, Wen Qiao-yan

Based on χ-type entangled states and the two-step protocol [Deng F G, Long G L and Liu X S 2003 Phys. Rev. A 68 042317], a quantum secret sharing protocol of secure direct communication based on χ-type entangled states |χ 00 ⟩ 3214 is proposed. Using some interesting entanglement properties of this state, the agent entirety can directly obtain the secret message from the message sender only if they collaborate together. The security of the scheme is also discussed.

Chinese Physics B•May 1, 2010•27 citations

Quantum secure direct communication scheme based on d- dimensional Bell entangled state

Pengfei Weng, Hong Chen, Xiaoxia Cai +2 more

In order to improve the communication efficiency and security of Quantum Secure Direct Communication, a new Quantum Secure Direct Communication scheme based on d-dimension Bell entangled state is proposed. In the scheme, the receiver and the sender transport the d-dimensional Bell particles as secure test particles to ensure the security of communication. The receiver can calculate the security of the channel according to the measurement of d-dimensional Bell state particles, which is based on the entanglement properties of the d-dimensional Bell state. Secret information is transmitted through the other d-dimensional Bell state particles by dense coding technique. Then, the receiver can determine the security of the channel by comparing the measurements of the particles and makes a joint measurement of the transmitted particles to obtain secret information. Finally, the entropy theory is used to analyze the security of the protocol. Under the four dimensional Bell state, the transmission efficiency of the protocol is 90.90% and the efficiency of the quantum bit is 45.45%. The results show that the proposed scheme is safe and reliable and has high transmission efficiency.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 8, 2017•0 citations

On the Hyperdense Coding and Proposal of Hyperdense Coding Quantum Secure Communication Protocol

Georgi Bebrov

The work proposes hyperdense coding - a combination of superdense coding and optimal quantum channel compression (a type of data encoding). Based on the hyperdense coding, an efficient quantum secure direct communication protocol is introduced.

Quantum Information and Measurement (QIM)•Jan 1, 2019•1 citation
In this paper, a quantum secure direct communication protocol with \ensuremathχ\ensuremath{\chi}\ensuremathχ-type entangled states \ensuremath∣\ensuremathχ00⟩3214{\ensuremath{\mid}{\ensuremath{\chi}}^{00}⟩}_{3214}\ensuremath∣\ensuremathχ00⟩3214​ is proposed. We analyze the security of this protocol and prove that it is secure in ideal conditions. Then, an alternative way is presented to ensure the security of this protocol in a noisy channel. Moreover, this protocol utilizes quantum superdense coding to achieve a high intrinsic efficiency and source capacity. The practical implementation of this protocol is also discussed.
Recently, a genuine five-qubit entangled state has been achieved by Brown et al.[ J. Phys. A 38 (2005) 1119 ]. Later it was indicated that this state can be used for quantum teleportation and quantum state sharing. Here we build a quantum secure direct communication protocol with this state, and prove that it is secure in ideal conditions. In the protocol, the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the receiver. The receiver then performs projective determinate measurement to decode the secret message directly. Furthermore, this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.
In order to improve the communication efficiency and security of Quantum Secure Direct Communication, a new Quantum Secure Direct Communication scheme based on d-dimension Bell entangled state is proposed. In the scheme, the receiver and the sender transport the d-dimensional Bell particles as secure test particles to ensure the security of communication. The receiver can calculate the security of the channel according to the measurement of d-dimensional Bell state particles, which is based on the entanglement properties of the d-dimensional Bell state. Secret information is transmitted through the other d-dimensional Bell state particles by dense coding technique. Then, the receiver can determine the security of the channel by comparing the measurements of the particles and makes a joint measurement of the transmitted particles to obtain secret information. Finally, the entropy theory is used to analyze the security of the protocol. Under the four dimensional Bell state, the transmission efficiency of the protocol is 90.90% and the efficiency of the quantum bit is 45.45%. The results show that the proposed scheme is safe and reliable and has high transmission efficiency.