Chin. Phys. Lett.  2007, Vol. 24 Issue (10): 2737-2740    DOI:
Original Articles |
Pairwise Entanglement and Quantum Phase Transitions in Spin Systems
GU Shi-Jian1;TIAN Guang-Shan1,2;LIN Hai-Qing1
1Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Hong Kong2School of Physics, Peking University, Beijing 100871
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GU Shi-Jian, TIAN Guang-Shan, LIN Hai-Qing 2007 Chin. Phys. Lett. 24 2737-2740
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Abstract We examine several well-known quantum spin models and categorize
the behaviour of pairwise entanglement at quantum phase transitions. A
unified picture on the connection between the entanglement and quantum
phase transition in spin systems is presented.
Keywords: 03.67.Mn      03.65.Ud      05.70.Jk      73.43.Nq     
Received: 12 June 2007      Published: 20 September 2007
PACS:  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  03.65.Ud (Entanglement and quantum nonlocality)  
  05.70.Jk (Critical point phenomena)  
  73.43.Nq (Quantum phase transitions)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I10/02737
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GU Shi-Jian
TIAN Guang-Shan
LIN Hai-Qing
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