Quantum Cloning, Bell's Inequality and Teleportation

Details Quantum Cloning, Bell's Inequality and Teleportation Quantum Cloning, Bell's Inequality and Teleportation

2007-12-10

arxiv.org/abs/0712.1404v2

J. Phys. A: Math. Theor. 41 415302 (2008)

Physics

Quantum Physics

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

Scientific paper

10.1088/1751-8113/41/41/415302

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.

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