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- Title
Scalable multiple GHZ states equations and its applications in efficient quantum key agreement.
- Authors
Xu, Yuguang; Wang, Chaonan; Wang, Xueying; Zhu, Hongfeng
- Abstract
Using the unique entanglement and measurement properties of four-particle GHZ states, we systematically analyze two four-particle GHZ states, three four-particle GHZ states, and four four-particle GHZ states exchanging one or two groups of particles, respectively. When certain expressions are satisfied, they are described as twelve interesting flexible equations, of which six are original equations and the other six are variant equations. Then based on these six original equations, we deduce m four-particle entangled GHZ states can exchange a group of particles and two groups of particles to obtain four general flexible equations. Two of them are original equations, and the other two are variant equations. There is a total of eight flexible original equations, and the other eight equations can be obtained through further transformations. Furthermore, we have carried out research on these flexible equations in the field of quantum key agreement. In particular, a novel quantum key agreement protocol is proposed in combination with decoy photons, which can guarantee the unconditional security of the protocol. It is feasible to use existing quantum processing technology to implement the proposed protocol.
- Subjects
EQUATIONS of state; PHOTONS
- Publication
Quantum Information Processing, 2022, Vol 21, Issue 3, p1
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-022-03428-6