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Journal of Yunyang Teachers College

Realizing Quantum Dense Coding by One-dimensional Cluster State

Wang An-fu

Published Jan 1, 2010• 0 citations
OpenAlex

Abstract

A scheme of quantum dense coding by one-dimensional cluster state is proposed.In the scheme,it is possible to transmit n bits of classical information by sending only n=2(n is even) or(n + 1)=2(n is odd) qubits.

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An experimentally feasible scheme for implementing four-atom quantum dense coding of an atom–cavity system is proposed. The cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity. Thus the scheme is insensitive to cavity decay and the thermal field. In the scheme, Alice can send faithfully 4 bits of classical information to Bob by sending two qubits. Generalized Bell states can be exactly distinguished by detecting the atomic state, and quantum dense coding can be realized in a simple way.