CONTROLLED DENSE CODING VIA GHZ-CLASS STATE

Yi-Bin Huang (), Song-Song Li () and Yi-You Nie ()
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Yi-Bin Huang: Department of Physics, Jiangxi Normal University, Nanchang 330022, China
Song-Song Li: Department of Physics, Jiangxi Normal University, Nanchang 330022, China
Yi-You Nie: Department of Physics, Jiangxi Normal University, Nanchang 330022, China

International Journal of Modern Physics C (IJMPC), 2008, vol. 19, issue 10, 1509-1514

Abstract: A controlled quantum dense coding protocol with GHZ-class state is proposed. In this case the sender (Alice) can send information to the receiver (Bob), whereas the supervisor (Cliff) can control the quantum channel between Alice and Bob via his local measurement. The amount of classical information is shown to be controlled by the supervisor through adjustments of the local measurement angles and depend on the coefficients of the original GHZ-class state. We also give two concrete methods for Alice to deal with one of Cliff's measurement result which is more complicated.

Keywords: GHZ-class state; controlled dense coding; 03.67.Hk (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0129183108013059

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