Abstract
The schemes on quantum dense coding and teleportation [Phys. Lett. A 364 (2007) 7] are revisited. By reformulizing one-dimensional n -qubit cluster states, we decompose the necessary multi-qubit collective unitary operation into a sequence of single-qubit Hadamard ( H ) and two-qubit controlled-not ( C ) operations. Our reduction makes the schemes feasible today.
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