Two-party Quantum Key Agreement with Six-particle Entangled States Against Collective Noise

Quantum key agreement (QKA) is an advanced technique that allows multiple parties to share a secret key through cooperation. At present, most QKA protocols have the problems of weak anti-noise ability and low qubit efficiency. In this paper, two improved two-party QKA protocols are proposed using tw...

Full description

Saved in:
Bibliographic Details
Published inInternational journal of theoretical physics Vol. 62; no. 11
Main Authors Jiang, She-Xiang, Fang, Lei, Fang, Xian-Jin
Format Journal Article
LanguageEnglish
Published New York Springer US 31.10.2023
Subjects
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
Six-particle entangled states
Quantum key agreement
Qubit efficiency
Collective noise
Logical qubits
Online AccessGet full text

Cover

More Information
Summary:Quantum key agreement (QKA) is an advanced technique that allows multiple parties to share a secret key through cooperation. At present, most QKA protocols have the problems of weak anti-noise ability and low qubit efficiency. In this paper, two improved two-party QKA protocols are proposed using two sets of special logical qubits, which are immune to the collective noise. The main idea of these two protocols is that first, through the measurement correlation of the six-particle entangled states, the communication parties can fairly build a common key. Then, decoy logical qubits and delayed measurement technology are employed to prevent eavesdropping in quantum channels. Security analysis indicates that both protocols are unconditionally secure and capable of resisting internal and external attacks. In addition, compared with existing protocols, both protocols improve the efficiency because they transmit longer qubits.
ISSN:1572-9575
1572-9575
DOI:10.1007/s10773-023-05414-9