Broadcasting of entanglement and universal quantum cloners
Quantum Physics
2009-10-31 v3
Abstract
We study broadcasting of entanglement where we use universal quantum cloners (in general less optimal) to perform local cloning operations. We show that there is a lower bound on the fidelity of the universal quantum cloners that can be used for broadcasting. We prove that an entanglement is optimally broadcast only when optimal quantum cloners are used for local copying. We also show that broadcasting of entanglement into more than two entangled pairs is forbidden using only local operations.
Keywords
Cite
@article{arxiv.quant-ph/9902073,
title = {Broadcasting of entanglement and universal quantum cloners},
author = {Somshubhro Bandyopadhyay and Guruprasad Kar},
journal= {arXiv preprint arXiv:quant-ph/9902073},
year = {2009}
}
Comments
8 pages, Latex,final version, to appear in Physical Review A