Local Entanglement and quantum phase transition in spin models

Details Local Entanglement and quantum phase transition in spin models Local Entanglement and quantum phase transition in spin models

2005-09-12

arxiv.org/abs/quant-ph/0509070v1

Shi-Jian Gu, Guang-Shan Tian, Hai-Qing Lin, New Journal of Physics 8, 61 (2006).

Physics

Quantum Physics

6 pages, 7 figures

Scientific paper

10.1088/1367-2630/8/4/061

Due to the phase interference of electromagnetic wave, one can recover the total image of one object from a small piece of holograph, which records the interference pattern of two laser light reflected from it. Similarly, the quantum superposition principle allows us to derive the global phase diagram of quantum spin models by investigating a proper local measurement. In the present paper, we study the two-site entanglement in the antifferomagnetic spin models with both spin-1/2 and 1. We show that its behaviors reveal some important information on the global properties and the quantum phase transition of these systems.

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