Remote information concentration, the reverse process of quantum telecloning, is presented. In this scheme, quantum information originally from a single qubit, but now distributed into three spatially separated qubits, is remotely concentrated back to a single qubit via an initially shared entangled state without performing any global operations. This entangled state is an unlockable bound entangled state and we analyze its properties.
@article{arxiv.quant-ph/0008078,
title = {Remote information concentration using a bound entangled state},
author = {Mio Murao and Vlatko Vedral},
journal= {arXiv preprint arXiv:quant-ph/0008078},
year = {2009}
}