# Operational criterion for controlled dense coding with non-trivial tripartite entangled states

@article{Roy2016OperationalCF, title={Operational criterion for controlled dense coding with non-trivial tripartite entangled states}, author={Sovik Roy and Biplab Ghosh and Md. Manirul Ali}, journal={Pramana}, year={2016}, volume={91}, pages={1-6} }

In this paper, we provide an operational criterion for controlled dense coding (CDC) with a general class of three-qubit partially entangled states. A general three-qubit pure entangled state can be classified into two inequivalent classes according to their genuine tripartite entanglement. We claim that if a three-qubit state shows entanglement characteristic similar to Greenberger–Horne–Zeilinger (GHZ)-class, then such non-trivial tripartite states are useful in CDC whereas states belonging… Expand

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Optimal quantum channel for perfect controlled super-dense coding protocol

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This work addresses the issue of how to prepare the quantum channel which is optimal in the sense that no cbits can be transmitted with certainty without the controller's cooperation and calculates and analyzing the control power for specific quantum channels to figure out the one that is optimal. Expand

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