A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2012; you can also visit the original URL.
The file type is application/pdf
.
Optimal cloning of qubits given by an arbitrary axisymmetric distribution on the Bloch sphere
2010
Physical Review A. Atomic, Molecular, and Optical Physics
We find an optimal quantum cloning machine, which clones qubits of arbitrary symmetrical distribution around the Bloch vector with the highest fidelity. The process is referred to as phase-independent cloning in contrast to the standard phase-covariant cloning for which an input qubit state is a priori better known. We assume that the information about the input state is encoded in an arbitrary axisymmetric distribution (phase function) on the Bloch sphere of the cloned qubits. We find
doi:10.1103/physreva.82.042330
fatcat:y2licxeekneffalilj3lzcckae