Quantum information and communication processing within quantum networks usually employs identical particles. Despite this, the physical role of quantum statistical nature of particles in large-scale networks remains elusive. Here, we show that just the indistinguishability of fermions makes it possible a new mechanism of entanglement transfer in many-node quantum networks. This process activates remote entanglement among distant sites, which do not share a common past, by only locally counting identical particles and classical communication. These results constitute the key achievement of the present technique and open the way to a more stable multistage transfer of nonlocal quantum correlations based on fermions.
@article{arxiv.1812.02141,
title = {Activating remote entanglement in a quantum network by local counting of identical particles},
author = {Alessia Castellini and Bruno Bellomo and Giuseppe Compagno and Rosario Lo Franco},
journal= {arXiv preprint arXiv:1812.02141},
year = {2019}
}
Comments
8 pages, 4 figures. Updated manuscript, close to the published version