Abstract

The problem of manipulating and controlling the flux of quantum information from a quantum system to many ones has been generally tackled and solved by the theory of quantum cloning [1]. Indeed, from a practical point of view, this process is considered a useful tool for the optimal distribution of quantum information carried by N qubits into several quantum channels and for the transmission of information contained in a system into correlations between many systems. On a more fundamental level, it has been suggested that, in the domain of quantum optics, the cloning process can also be adopted to investigate the intriguing transition of the quantum behavior from the “microscopic world”, represented here by one of few properly encoded photons, to the mesoscopic and macroscopic one composed by many particles.

© 2007 IEEE