期刊
EUROPEAN PHYSICAL JOURNAL D
卷 50, 期 1, 页码 103-105出版社
SPRINGER
DOI: 10.1140/epjd/e2008-00202-4
关键词
-
资金
- National Natural Science Foundation of China [10774108]
- Higher Education of China [20050285002]
The fidelity and entanglement entropy in an antiferromagnetic-ferromagnetic alternating Heisenberg chain are investigated by using the method of density-matrix renormalization-group. The effects of anisotropy on fidelity and entanglement entropy are investigated. The relations between fidelity, entanglement entropy and quantum phase transition are analyzed. It is found that the quantum phase transition point can be well characterized by both the ground-state entropy and fidelity for large system.
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