We study quantum entanglement in one-dimensional correlated fermionic system. Our results show, for the first time, that entanglement can be used to identify quantum phase transitions in fermionic systems.
@article{arxiv.quant-ph/0405067,
title = {Entanglement and quantum phase transition in the extended Hubbard model},
author = {Shi-Jian Gu and Shu-Sa Deng and You-Quan Li and Hai-Qing Lin},
journal= {arXiv preprint arXiv:quant-ph/0405067},
year = {2009}
}