Quantum Cloning, Bell's Inequality and Teleportation

Abstract

We analyze a possibility of using the two qubit output state from Buzek-Hillery quantum copying machine (not necessarily universal quantum cloning machine) as a teleportation channel. We show that there is a range of values of the machine parameter $\xi$ for which the two qubit output state is entangled and violates Bell-CHSH inequality and for a different range it remains entangled but does not violate Bell-CHSH inequality. Further we observe that for certain values of the machine parameter the two-qubit mixed state can be used as a teleportation channel. The use of the output state from the Buzek-Hillery cloning machine as a teleportation channel provides an additional appeal to the cloning machine and motivation of our present work.

7 pages and no figures, Accepted in Journal of Physics A

References in corpus (4)

• Separability Criterion for Density Matrices
• Separability of Mixed States: Necessary and Sufficient Conditions
• Quantum Copying: Beyond the No-Cloning Theorem
• Teleportation, Bell's Inequalities and Inseparability

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• Deletion, Bell's Inequality, Teleportation
• Complementarity of genuine multipartite non-locality
• Teleportation fidelity of quantum repeater networks
• A cloned qutrit and its utility in information processing tasks
• Teleportation Fidelity of Binary Tree Quantum Repeater Networks