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Optimal mirror phase-covariant cloning
2009
Physical Review A. Atomic, Molecular, and Optical Physics
We propose a quantum cloning machine, which clones a qubit into two clones assuming known modulus of expectation value of Pauli Z-matrix. The process is referred to as the mirror phase-covariant cloning, for which the input state is a priori less known than that for the standard phase-covariant cloning. Analytical expressions describing the cloning transformation and fidelity of the clones are found. Extremal equations for the optimal cloning are derived and analytically solved by generalizing
doi:10.1103/physreva.80.032306
fatcat:upkipwghz5edlayvzlfvkbe6fa