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Quantum secure direct communication by entangled qutrits and entanglement swapping

โœ Scribed by You-Bang Zhan; Ling-Ling Zhang; Qun-Yong Zhang

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
155 KB
Volume
282
Category
Article
ISSN
0030-4018

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โœฆ Synopsis

A protocol for quantum secure direct communication by using entangled qutrits and swapping quantum entanglement is proposed. In this protocol, a set of ordered two-qutrit entangled states is used as quantum information channels for sending secret messages directly. During the process of transmission of particles, the transmitted particles do not carry any secret messages and are transmitted only one time. The protocol has higher source capacity than protocols using usual two-dimensional Bell-basis states as quantum channel. The security is ensured by the unitary operations randomly performed on all checking groups before the particle sequence is transmitted and the application of entanglement swapping.

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