Optimal phase covariant cloning for qubits and qutrits

Details Optimal phase covariant cloning for qubits and qutrits Optimal phase covariant cloning for qubits and qutrits

2003-01-31

arxiv.org/abs/quant-ph/0301175v1

Physics

Quantum Physics

8 pages

Scientific paper

10.1103/PhysRevA.67.042306

We consider cloning transformations of equatorial qubits and qutrits, with the transformation covariant for rotation of the phases. The optimal cloning maps are derived without simplifying assumptions from first principles, for any number of input and output qubits, and for a single input qutrit and any number of output qutrits. We also compare the cloning maps for global and single particle fidelities, and we show that the two criteria lead to different optimal maps.

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