Geometric Phase and Quantum Phase Transition in the Lipkin-Meshkov-Glick model

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Cui, H. T. ; Li, K. ; Yi, X. X. (2006)

The relation between the geometric phase and quantum phase transition has been discussed in the Lipkin-Meshkov-Glick model. Our calculation shows the ability of geometric phase of the ground state to mark quantum phase transition in this model. The possibility of the geometric phase or its derivatives as the universal order parameter of characterizing quantum phase transitions has been also discussed.
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