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Quantum Direct Communication with Non-symmetric Quantum Channel Superdense Coding

Qiu-Bo Fan, Zheng Zhen-jin

Published Sep 20, 2007• 0 citations
OpenAlex

Abstract

A scheme of quantum direct communication using non-symmetric quantum channel superdense coding is proposed. In this scheme, the server prepares the initial states in two nonorthogonal basis sets which forbids any one to copy them perfectly, so the scheme is more secure. This scheme also has a higher capacity than other schemes, for using the ideas in non-symmetric quantum channel superdense coding.

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International Conference on Security Technology (SecTech)•Dec 1, 2008•0 citations
A scheme of quantum direct communication using non-symmetric quantum channel superdense coding is proposed. In this scheme, the server prepares the initial states in two nonorthogonal basis sets which forbids any one to copy them perfectly, so the scheme is more secure. This scheme also has a higher capacity than other schemes, for using the ideas in non-symmetric quantum channel superdense coding.
A quantum secure direct communication network scheme is proposed with quantum superdense coding and decoy photons. The servers on a passive optical network prepare and measure the quantum signal, i.e. a sequence of the d -dimensional Bell states. After confirming the security of the photons received from the receiver, the sender codes his secret message on them directly. For preventing a dishonest server from eavesdropping, some decoy photons prepared by measuring one photon in the Bell states are used to replace some original photons. One of the users on the network can communicate to any other one. This scheme has the advantage of high capacity, and it is more convenient than others as only a sequence of photons is transmitted in quantum line.