We propose a scheme to generate and detect entanglement between charge states in superconducting nanocircuits. We discuss different procedures to discriminate such entanglement from classical correlations. The case of maximally entangled states of two and three coupled Josephson junctions is discussed as example.
@article{arxiv.cond-mat/0105029,
title = {Macroscopic entanglement in Josephson nanocircuits},
author = {Francesco Plastina and Rosario Fazio and G. Massimo Palma},
journal= {arXiv preprint arXiv:cond-mat/0105029},
year = {2009}
}