Phys. Rev. Lett. 93, 086402 (2004) [4 pages]

Entanglement and Quantum Phase Transition in the Extended Hubbard Model

Abstract

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Shi-Jian Gu^1,2, Shu-Sa Deng¹, You-Quan Li², and Hai-Qing Lin¹
¹Department of Physics, The Chinese University of Hong Kong, Hong Kong, China
²Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, People's Republic of China

Received 3 October 2003; published 17 August 2004

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.93.086402

DOI:

10.1103/PhysRevLett.93.086402

PACS:

71.10.Fd, 03.65.Ud, 03.67.Mn, 05.70.Jk

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Phys. Rev. Lett. 93, 086402 (2004) [4 pages]

Entanglement and Quantum Phase Transition in the Extended Hubbard Model