Quantum cloning machines and their implementation in physical systems
Tao Wu, Bao‐Long Fang, Ye Liu · Chinese Physics B · 2013
We review the basic theory of approximate quantum cloning for discrete variables and some schemes for implementing quantum cloning machines. Several types of approximate quantum clones and their expansive quantum clones are introduced. As for the implementation of quantum cloning machines, we review some design methods and recent experimental results.