Quantum cloning of orthogonal qubits
量子物理
2009-11-07 v1
摘要
An optimal universal cloning transformation is derived that produces M copies of an unknown qubit from a pair of orthogonal qubits. For M>6, the corresponding cloning fidelity is higher than that of the optimal copying of a pair of identical qubits. It is shown that this cloning transformation can be implemented probabilistically via parametric down-conversion by feeding the signal and idler modes of a nonlinear crystal with orthogonally polarized photons.
引用
@article{arxiv.quant-ph/0110016,
title = {Quantum cloning of orthogonal qubits},
author = {J. Fiurasek and S. Iblisdir and S. Massar and N. J. Cerf},
journal= {arXiv preprint arXiv:quant-ph/0110016},
year = {2009}
}
备注
4 pages, 1 figure, RevTeX 4