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Entanglement and quantum phase transition in the extended Hubbard model
Shi-Jian Gu1, Shu-Sa Deng, You-Quan Li
1Department of Physics, The Chinese University of Hong Kong, Hong Kong, China.
Physical Review Letters
|September 28, 2004
Abstract:
We study quantum entanglement in a 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.